Roger Federer was in Maimi for the Formula One race and he reunited with some pretty prominent tennis folks at the race such as
Juan Martin Del Potro and the Williams sisters.
Formula One is quite a spectacle and it's not unheard of to see many prominent figures at races. Monaco has been historically known to attract huge masses of famous people to its race but Miami is a pretty popular destination as well. Beautiful weather, a great city, and a lot of tennis folk in Florida as well.
Federer met some of them at the race with the Swiss ace reuniting with Juan Martin Del Potro and Serena and Venus Williams there. He also spoke about the race saying:
"This is my third time, yes. I’ve been to Abu Dhabi, the big race with [Lewis] Hamilton and [Nico] Rosberg at the time, and then I did Barcelona qualifying last year which I really enjoyed as well. It's a bit more relaxed away from the big race and then, now here. So it’s great fun to be back, having finally a bit of time to do things like this as well.”