Roger Federer isn't the only one hanging out with NBA stars. Jason Collins, a retired NBA player and the first-ever male basketball player to come out as gay, is in Hong Kong. As the WTA players contest the Hong Kong Tennis Open, they're getting a chance to catch up with Collins.

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Collins got some one-on-one time with Jennifer Brady...

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...and Venus Williams. While Williams is an impressive 6'1", Collins dwarfs her at 7'0".

Collins put in some quality hours on site, also cheering on Nicole Gibbs and Naomi Osaka.