Benjamin Pavard scored the winning goal as Germany's Bayern Munich defeated Mexican side Tigres 1-0 in the Club World Cup final to claim its sixth trophy within a year.
The Bundesliga giant finished the 2019-2020 season with a treble-winning performance and have won the UEFA Super Cup and German Super Cup too.
Thus Hansi Flick's Bayern became the second football team in history to win all six domestic and international titles available within 12 months after 2009's Barcelona, coached by former Bayern manager Pep Guardiola.
This is also the eighth year in a row that a European club has won the title in this tournament.
"Even for the successful club that is FC Bayern Munich, this was the most successful season ever. The team played outstandingly. The win was never in danger, we dominated and deservedly won the final," said Flick, who started to take charge of the Bavarians in November 2019.
"It was very difficult for me as well, we were all at the limit, the same goes for me at the touchline. The match against Tigres was on eye-level, even though we dominated. They deserved to be in this final."
Despite Thursday's defeat, Tigres had already written the club's history as it was the first Mexican outfit to reach the Club World Cup final as CONCACAF champion.
Bayern's attacking player Thomas Muller was absent after testing positive for the Covid-19 only hours before the kick-off and has been put into self-isolation.
"It's bad news he can't be here and I hope he's back soon," said striker Robert Lewandowski, who set up for Pavard's goal.
The goal was initially ruled out for a Lewandowski offside but was allowed after a VAR consultation.
"It feels good to have the six-pack -- six titles in a row is something very special for us," said Lewandowski, who had beaten Lionel Messi and Cristiano Ronaldo to be named as the FIFA Best Player of 2020.
"I think this is one of the biggest achievements in football, how we played will be remembered for a long time," the Poland international added.
Midfielder Corentin Tolisso had a chance to extend the lead but his strike was denied by the post.
Earlier in the day, Egyptian club Al Ahly beat South American champion Palmeiras 3-2 on penalties after a goalless draw to clinch third place.
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