The Uruguayan showed endeavor from the moment he stepped on the field midway during the second period, looking relatively in tune with the Reds' midfielders as he latched onto through balls and got involved in physical battles with the opposing center-backs.
He ended up making two game-deciding contributions via winning the penalty and scoring his header. As he sank to his knees at the full-time whistle, the joy and relief were evident. A couple of weeks prior, Andy Carroll had been trending on social media in response to Nunez's preseason debut against Manchester United. The pressure could've easily started to mount.
Klopp used his post-match press conference to rubbish that premature criticism: “[The debut was] good. Really good. It was clear he’ll get better in time. He’ll get judged at first sight, but that doesn’t help. [The criticism in the preseason was] a joke. The impact from the bench was really exceptional."
Liverpool vs. Man City live updates and highlights from Community Shield
FULL-TIME: LIVERPOOL WIN THE 2022 COMMUNITY SHIELD! Nunez falls to his knees in celebration, as Klopp gets ready to lift a third trophy of the calendar year.
96th min: Wow! Haaland has a wry smile on his face as he misses a near-open goal. Bearing down on the net with Adrian already on the floor after saving Foden's strike, Haaland hits the bar. A day to forget for the new boy.
95th min: After an impressive display, Salah departs the field for Curtis Jones.
94th min: GOAL! Nunez scores on his debut! The Uruguayan stoops low to head in and seal the game. 3-1 to Liverpool.
92nd min: Haaland has the ball in the net, but it had clearly already gone out of play before Foden hooked it back into the No.9. At the other end, some brief worry for the other star signing as Nunez goes down injured.
91st min: Hope for City, as a seven-minute chunk of added time, is announced.
90th min: Another debut here, as Fabio Carvalho, emerges from the Reds bench to replace Luis Diaz.
88th min: Robertson steams in to dispossess Bernardo Silva, but can't keep his effort down. If there's another late goal here, it looks to be Liverpool's.
86th min: The Reds are on the up again, as Salah torments Cancelo again before eventually, Elliott plays in Keita, whose effort is saved. From the resulting corner, Nunez's header goes wide.
85th min: Naby Keita replaces Thiago, who has been superb this evening.
83rd min: GOAL! Liverpool is back in front, as Salah puts the penalty low to Ederson's left corner and just past the Brazilian, who dived the right way. 2-1.
82nd min: PENALTY! The decision was overturned, and Salah has a chance to get off the mark from the spot.
81st min: We're now going to VAR for the possible penalty!
80th min: Nunez has a header that clearly strikes the hand of Dias, but howls of "handball" from the Liverpool faithful behind that goal are waved away.
76th min: It's like-for-like alterations in the Reds' lineup, with Milner slotting in at right-back and Elliott getting into the play immediately just ahead of him. For City, a Bernardo Silva effort loops over but looked to be dangerous.
74th min: Changes on both sides. De Bruyne, who has had a poor afternoon, is off for Ilkay Gundogan. Klopp brings on James Milner and Harvey Elliott for Alexander-Arnold and Henderson.
72nd min: GOAL! VAR checks the goal and rules Foden has been onside in the build-up! Alvarez makes his mark within 14 minutes, and we're all square.
70th min: Alvarez has the ball in the net but it's ruled out! Foden steams in at the back post and his first-time effort is stopped by Adrian, but the rebound is converted by the Argentinian new boy, only to be pulled back for the England international's run.
64th min: Nunez with a big chance. He latches onto an error and plays it first time to Henderson, who in return tees up the former Benfica man on the run. Nunez can't lift it over Ederson, however, and the dream debut remains on ice.
59th min: Drama for Nunez already! He takes on Ake one-on-one and bears down on goal, before being brought down by Ederson after dragging his touch wide. However, instead of a penalty, the referee rightly pulls it back for offside instead.
58th min: New signing Julian Alvarez makes his City debut, coming on Mahrez. Phil Foden is on, too, for compatriot Grealish. For Liverpool, Nunez gets the biggest cheer of the day as he arrives in place of Firmino.
54th min: Both sides have their moments early in this second period as it settles into a fairly even rhythm. Diaz is roaming to good effect, dropping deep and central at times to spray balls along the ground. Robertson is making headway in the space left down the left.
47th min: City start the second half on top, as Rodri finds Mahrez with a lofted pass into the six-yard box. The Algerian brings it under control but his relatively weak effort is parried by Adrian.
46th min: We're back in action at the King Power. No substitutions at the interval.
HALF-TIME: It's 1-0, and the Reds are on course to win a third trophy of 2022.
45th min: The half finishes with Liverpool on the attack again, Thiago finding himself in acres of space on the break, before playing in Salah, whose effort goes gratefully into the arms of Ederson.
41st min: Klopp is furious on the touchline as the referee fails to blow up for an Alexander-Arnold injury. The England international was clattered into by a charging Cancelo, but the City attack continued.
40th min: City has begun to slightly turn the screw as we approach half-time. It's been a good little spell from Guardiola's men, with the latest effort seeing Mahrez fire into Adrian's arms from the right.
34th min: Haaland gets away with his first effort and scuffs his second. The hulking center-forward shrugs off Robertson with ease before sliding a left-footed effort into Adrian, before the clearance is eventually put back into the six-yard box by Bernardo Silva, but Haaland is unable to make a good connection in the air. It's a warning sign for Liverpool.
32nd min: Nunez is greeted by the Liverpool fans for the first time as he warms up in front of them, with a noise only beaten by the goal celebration so far. The Uruguayan will be licking his lips at the prospect of facing this City back-line. Meanwhile, Henderson loses it with Alexander-Arnold in a similar area, bellowing at his right-back after he gave away a needless foul.
25th min: Chance for City to equalize, as Riyad Mahrez finds himself in plenty of space just outside the Liverpool area, playing in De Bruyne. The Belgian's low effort goes just wide. At the other end, Henderson yet again breaks down the right, where City is struggling, but the move eventually falters with Roberto Firmino's effort.
21st min: GOAL! Trent Alexander-Arnold opens the scoring for Liverpool! A Thiago ball reaches Salah on the right of the area, who lays it onto the right-back, with his effort curling outwards onto the post and in. It took a slight glance off Ake on the way in but looked to be heading on target regardless.
19th min: Ederson rescues City as Henderson capitalizes on an error down the league champions' left flank, with his tantalizing ball narrowly being deflected out of the onrushing Luis Diaz's path.
14th min: An Andy Robertson header at the back post is the latest Liverpool chance, with the Scot very nearly finishing off a patient Liverpool move.
12th min: As one would expect at this time of year, slightly-miscued passes and poor touches are the order of the day so far. Other than Thiago playing some predictably sumptuous balls, the execution is off all around, even if the energy isn't.
8th min: De Bruyne latches onto a loose ball in the final third and breaks into the box, with his left-footed strike deflected into the side-netting by Van Dijk.
6th min: A very frenetic start here. De Bruyne's eyes light up as he spots a run through the pair of Liverpool center-backs, but can't quite squeeze it through, while at the other end Salah can't quite bring a long ball under his spell despite a nice first touch. Cue the "curse of the commentator", but this isn't ending goalless.
3rd min: Liverpool is feeling this early on. Salah breaks down the right, latching onto a long ball and getting past Cancelo with ease. The Egyptian's effort goes into the side netting, though.
2nd min: Luis Diaz with the first half-chance of the game, nearly capitalizing as Rodri made a mess of clearing a Jordan Henderson cross.
2 mins to KO: Fans are in, players are out, trophies are on the pedestals: we're ready to go. Liverpool fans have drowned out the national anthem with boos once again, as was the case at Wembley last season.
15 mins to KO: Reflecting on the backend of 2021/22, which saw him win the Premier League Golden Boot for the third time in five years but miss out on the quadruple, Salah said in the program: "I always go into every season wanting to win the Golden Boot and it's one of my favorite awards. But I would happily have given all the individual awards away last season just to win the Premier League on the last day and then the Champions League. That would've been great and I would have taken that 100%."
30 mins to KO: The stadium is beginning to fill up and Liverpool fans, as is often the case in 'neutral' venues, make the early noise. Haaland is out to boos from the traveling Reds, with a special ovation reserved for Mo Salah as he appeared on the big screens, and has now signed a new contract.
40 mins to KO: Last term, the Community Shield was lifted by today's hosts, Leicester. Usually, this game is played at Wembley, but the national stadium is currently occupied with the Women's Euro 2022, as England prepares to take on Germany in tomorrow night's final.
50 mins to KO: Since Manchester United in 2010, the team winning the Community Shield has a very poor record in going on to win the Premier League. Only City, after defeating Chelsea 2-0 in 2018, has gone on to lift the title later that season.
1 hour to KO: Team news is here! Haaland starts for City, but Nunez has only been named on the bench for Liverpool.
1 hour 15 mins to KO: Liverpool enters the new season having missed out on the Premier League title in agonizing fashion, yet again, to City in May. Klopp has used his program notes here at the King Power to downplay any frustration, though: "Our respect for this City team could not be higher. They arrive here as champions and, though we can be incredibly proud for pushing them all the way, they deserved their title and now our job is to start the race all over again."
1 hour 30 mins to KO: For City, this evening represents only their third game of preseason — the previous two being wins over Bayern Munich and Club America — in a summer that has seen some intriguing changes to the squad. Haaland and Kalvin Phillips have arrived, with several key departures including Raheem Sterling, Gabriel Jesus, Oleksandr Zinchenko, and Fernandinho.
1 hour 45 mins to KO: Liverpool has lost their last two Community Shield games, making this the only trophy Klopp is yet to lift as manager of the Reds. Most recently, as league champions, they fell to a penalty shootout defeat against Arsenal in 2020, after a year before suffering the same fate versus today's opponents. Both ties ended 1-1.
2 hours to KO: Welcome to The Sporting News' live coverage from King Power Stadium in cloudy Leicester, as Liverpool and Man City raise the curtain on the new season.