Tweets of the Week: Roger Federer goofs off at French Open media day

Roger Federer shows why he's probably the goofiest dad on tour, Andrea Petkovic gushes over Ernests Gulbis and Serena Williams is all about sisters before misters. Here are the best tweets of the week.

Lim was drawn as Serena's first round opponent. 

Thanks for reading our Gulbis interview, Petko!

Maria might want to keep that jacket on hand next week...

Julia Goerges beat Sloane Stephens and Lauren Davis before losing to Madison Keys.