Watch: Warriors get surprise visit from Roger Federer in China

A serendipitous meeting of champions took place Sunday in Shanghai.

Tennis legend Roger Federer visited the Golden State Warriors' locker room before their exhibition game against the Minnesota Timberwolves at Mercedes-Benz Arena.

The 19-time Grand Slam champion, who's in China for an ATP World Tour event, shared stories and advice with the defending NBA champs before their 142-110 victory.

Federer will open his Shanghai Masters campaign with a second-round matchup with the winner of Sunday's match between Diego Schwartzman and Jordan Thompson.