The referee said in his match report he showed the card because Messi "delayed his return to his half of the pitch after the goal was scored with the intention of wasting time".
Portugal and Real Madrid forward Cristiano Ronaldo was named the world's best footballer for the second time on Monday, preventing his great rival Lionel Messi from winning the award for a fifth year in a row.
Barcelona are convinced Brazil captain Neymar will commit his long-term future to the Nou Camp as protracted negotiations between the Spanish champions and the striker continue over an extension to his current deal, which expires in June 2018.
City completed the treble of Champions League, Premier League and FA Cup titles, matching Manchester United's feat in 1999 and drawing comparisons with Guardiola's 2008-09 Barcelona team.
Barcelona won the La Liga title with a comfortable 3-0 victory at Granada thanks to a Luis Suarez hat-trick in the season finale on Saturday.
Winning the treble last season has spurred Barcelona to try and win all six trophies up for grabs this year and replicate the feat they achieved in 2009, midfielder Andres Iniesta said on Monday.
Barcelona were pitted against Italian champions Juventus in the Champions League quarter-final draw made on Friday to set up a repeat of the 2015 final which the Spanish side won 3-1.
Brazil will face the winners of Tuesday's other semi-final between Spain and Japan in Saitama.
Barcelona defender Martin Montoya is eyeing a move to the Premier League having decided to leave the Catalan club in the January transfer window, his agent said.
Neymar made his return to the pitch after a three-month injury lay-off as Paris St Germain celebrated their eighth Ligue 1 title with a 3-1 win against Monaco at the Parc des Princes on Sunday.
Philippe Coutinho grabbed a hat-trick as Brazil ramped up their Copa America campaign with a resounding 7-1 win over a hapless Haiti on Wednesday. Renato Augusto scored a brace and substitutes Lucas Lima and Gabriel also goaled for Brazi, while James Marcelin put in Haiti's consolation goal. The scoreline -- identical to Brazil's nightmare 7-1 defeat by Germany in the World Cup semi-final two years ago -- takes Brazil to the top of Group B with four points, ahead of the evening's second game between Peru and Ecuador. Coutinho got Brazil off to a positive start in the Camping World stadium with a goal after 14 minutes when he skipped past a defender and hammered home from 20 metres out. He doubled Brazil's lead 15 minutes later thanks to Jonas, who was on hand to poke a loose ball across goal and leave the Liverpool player with the simplest of tap-ins.
German champions Bayern Munich sacked coach Carlo Ancelotti on Thursday, a day after they suffered a crushing 3-0 defeat to Paris St Germain in the Champions League.
Karim Benzema and Vinicius Jr both scored a brace to give the LaLiga leaders a 4-1 home win over Valencia
Barcelona beat Juventus 3-1 to claim the Champions League title on Saturday thanks to goals from Ivan Rakitic, Luis Suarez and Neymar in an entertaining final at the Olympic Stadium.
Brazil may be five-time winners of the World Cup and joint favourites to make it six in Russia this year but the South Americans do not yet have the right blend for success, three-time World Cup winner Pele said.
Neymar scored a spectacular goal as Barcelona came from behind to beat Paris St Germain 3-1 in their UEFA Champions League match.
PSG have never reached the semi-finals of the Champions League
Neuer sidelined for 'coming weeks' after knee surgery - Bayern
Goalkeeper Guillermo Ochoa made two outstanding saves to deny Neymar as battling Mexico held Brazil to a 0-0 draw in their World Cup Group A match on Tuesday, ending the hosts' 10-game winning streak in the process.
Luuk de Jong's first-half header gave Barcelona a 1-0 win at Mallorca
Real Betis right-back Emerson Aparecido's first year in La Liga went superbly well, but there is plenty to come from one of the league's most talented and determined rising stars.
Barcelona goalkeeper Victor Valdes is likely to be out of action until the end of the year after suffering a calf strain during Spain's surprise defeat by South Africa on Tuesday, the club said in a statement on their website.
World champions France had eight players, one less than former holders Spain, in international players' association FIFPro's 55-name shortlist for its World XI of 2018 award.
The international future of David Luiz looked to be in question after a poor performance and a needless sending off left coach Dunga fuming at his irresponsibility in Brazil's 1-1 draw against Argentina on Friday. Luiz was booked after 86 minutes for throwing an elbow and he was lucky not to get sent off for the rash intervention.
The improvement since Tite took over as coach in June 2016 has been remarkable and Brazil are now joint favourites to win a record sixth World Cup.
Barca made a slow start to the campaign under their new coach but after beating Paris Saint Germain in the quarter-finals they are on course to repeat the treble success.
Barcelona coach Luis Enrique expects Lionel Messi to bounce back from a difficult summer with his usual enthusiasm -- and does not rule out a return to international football.
Pepe has blasted the Liga club's fans as "unenthusiastic", contrasting the hushed atmosphere of the Santiago Bernabeu stadium with the cauldron of noise he is now exposed to with Turkish champions Besiktas.
Argentina lose to Brazil in Copa America semis
World-record signing Neymar greeted delirious fans at a grand welcome event at Paris St Germain's stadium on Saturday but must sit out the French club's Ligue 1 opener after his transfer was not registered in time.
Barcelona rarely looked capable of repeating their heroic comeback in the last 16 against Paris St Germain.
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Gonzalo Higuain aims to repay Juventus for splashing out 90 million euros ($99.74 million) to sign him from Napoli and make the Argentina striker the third most expensive player in world football.
Brazil scored twice in the last four minutes, the second a first international goal from Real Madrid striker Rodrygo, to cap a comfortable 4-0 win over Paraguay in Tuesday's World Cup qualifier in Belo Horizonte.
News of all that's transpired on and off the football field
Lionel Messi broke a Spanish hat-trick record and Luis Suarez struck twice as a rampant Barcelona took over top spot in La Liga with a 6-1 hammering of Rayo Vallecano on Sunday.
Richarlison is a rarity among the overindulged footballing elite. In a World Cup which has been overshadowed by social issues, Brazil's latest football sensation is championing more than just one cause, observes Deepti Patwardhan.
Barcelona striker Neymar is confident the Catalans can launch another remarkable Champions League comeback as they look to overturn a 3-0 quarter-final deficit against Juventus on Wednesday.