Benjamin Pavard scored the only goal as Bayern Munich beat Tigres to win the Fifa Club World Cup final in Qatar, their sixth trophy in nine months.
Bayern have won the Uefa Super Cup, German Super Cup and are now world champions, to complete a clean sweep of trophies after last season's Treble.
Pavard's goal was initially ruled out for a Robert Lewandowski offside but given after VAR consultation.
Joshua Kimmich had earlier had a goal disallowed by the VAR.
This is the eighth year in a row that a European club has won the Fifa Club World Cup, including Liverpool last season.
Tigres of Mexico were the first team from North or Central America to reach the final but could not end the dominance of European and South American teams in the tournament.
Former France striker Andre-Pierre Gignac failed to add to his three goals in Qatar, although still won the Golden Boot.
Qatar was hosting the tournament, which is being viewed a trial run for next year's World Cup. A limited amount of fans were allowed to watch at the Education City Stadium in Al Rayyan.
The victory cemented Bayern's status as the outstanding club team of 2020 - the Club World Cup was meant to be in December but delayed because of Covid.
Since Hansi Flick took over in November 2019, they have won 58 out of 68 games - and lifted a trophy every 11.3 games.
They deserved their victory over Tigres, despite being far from their best.
Kimmich had a goal controversially ruled out by the VAR in the first half because Lewandowski - who did not touch the ball - was in an offside position and adjudged to have distracted the goalkeeper.
Lewandowski was flagged offside when his header was saved in the second half but Pavard's half-volley into an empty net was allowed to stand after VAR consultation.
Leroy Sane hammered a shot off the angle of post and bar, and Corentin Tolisso had a shot tipped on to the post as they could have won by more.
Analysis - Flick trying to bring peace
German football writer Raphael Honigstein
Bayern Munich see themselves as the German Barcelona, Juventus, Manchester United. They want this to be underlined with international trophies.
This was one of three they could win and they've done that. This was done with the backdrop of less-than-convincing performances and indeed some lack of harmony behind the scenes between sporting director Hasan Salihamidzic and head coach Hansi Flick.
Today Flick brought on some of the players Salihamidzic brought in during the summer break. Maybe he's doing his best to bring some peace. They won to have some peace and harmony back home.
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