Combined, the two of them have 62 million Twitter followers: Bieber has 61.3 million and Bouchard has a 442,000.
Bouchard is getting ready for the Indian Wells tournament, also in California. The tournament starts on Wednesday but Bouchard has a first-round bye.
That made it possible for her to hit a few backhands with her celebrity popstar crush, Biebs, and practice a few volleys with actors Will Ferrell and Kevin Hart.
Bouchard's crush on Bieber first became public during an awkward on-court interview at the 2014 Australian Open.
As for the results of the mixed doubles match between Bouchard-Bieber and Hart-Ferrell, they weren't made available.
It's also unclear if Bouchard asked Bieber to twirl.
Meanwhile, Bieber's performance in the tennis match seems to dispell any rumours of his demise.