Tuesday May 6th, 2014

Charity-Day-1 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.

Charity-Day-2

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)

Charity-Day-3

Rafa would like you to know that Andy Murray probably touched the net. (Denis Doyle/Getty Images)

Charity-Day-4

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:

http://youtu.be/KQYwYI-tq34

And here is Serena staying as far away from the soccer ball as possible: http://youtu.be/zAYfYi7d8E4

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