As if we didn't know this already, there's nothing 23-time Grand Slam women's singles champion Serena Williams can't do, including, it appears, lip sync. Williams took to the stage with model Brooklyn Decker and later with Decker's husband—longtime friend and fellow US Open champion Andy Roddick—for a pair of songs on "Lip Sync Battle" on Thursday. Roddick's reaction to Williams' first appearance is priceless.

Fan favorite Rafa Nadal will marry Maria Perello in Mallorca next year, it was revealed on social media this week. The couple has been dating for 14 years, and Spanish Magazine Hola reported that Rafa proposed to Perello in May last year.

Madison Keys continued her advocacy work for international anti-bullying charity FearlesslyGirl. Keys has been a supporter of the program for several years now, using her platform to give teen girls a voice in the hopes of creating a kinder world and bring an end to girl-on-girl bullying.

Wheelchair tennis got an endorsement from 20-time Grand Slam men's champion Roger Federer this week, when Federer appeared in a short video promoting the Uniqlo Wheelchair Tennis Tour. With the Swiss maestro under contract with apparel company Uniqlo for the foreseeable future, there's a chance we can see the superstar doing even more to promote these incredible athletes.

Champions were crowned this past weekend in Melbourne, with Naomi Osaka and Novak Djokovic capturing the first silverware of the season. There were moments of jubilation and scenes of laughter in the aftermath of the victories. But one of the funnier exchanges came in Djokovic's post-match press conference, when he responded to a question from well-liked Italian journalist Ubaldo Scanagatta.