Andy Murray (left) and Rafael Nadal (second from right) play a charity exhibition at the Madrid Open. (Denis Doyle/Getty Images)
Rafael Nadal, Andy Murray, and Serena Williams were just some of the players who helped kick off the Madrid Open this weekend, participating in a charity event with other Spanish athletes to raise money for the Spanish goalkeeper Iker Casillas' foundations.
The athletes goofed around on court, playing a number of different sports, including tennis, a combination of tennis and soccer (during which Serena comically avoids the soccer ball like the plague) and even volleyball.
Photos and highlights from the event below.
The most notable thing in this picture? Goodness gracious, how tall is Atletico Madrid's Thibaut Courtois? No wonder he's a goalkeeper. (Denis Doyle/Getty Images)
Rafa would like you to know that Andy Murray probably touched the net. (Denis Doyle/Getty Images)
Number One and Number One. (Denis Doyle/Getty Images)
Here's a clip of Rafa and Serena playing mixed doubles against Agnieszka Radwanska and Casillas. That's ... a bit of a mismatch:
And here is Serena staying as far away from the soccer ball as possible: