Djokovic, Federer, other players take on the ALS Ice Bucket Challenge

The ALS Ice Bucket challenge has taken over social media in the past few weeks, as celebrities, pro athletes and regular folks have dumped buckets of ice water on their heads in the name of ALS awareness (also known as Lou Gehrig's disease).
Roger Federer, Rafael Nadal, Novak Djokovic and Caroline Wozniacki were just some of the many tennis players to get involved in the viral campaign, but the two most notable holdouts so far are Serena Williams (who was nominated by Kendrick Lamar, Caroline Wozniacki, Ana Ivanovic, among others) and Maria Sharapova, who got the nod from her boyfriend Grigor Dimitrov.
I asked Serena about the challenge last week in Cincinnati and she said she was waiting to complete the challenge because she needed "props." Oh boy.
Here's a collection of some of the best ALS Ice Bucket Challenge videos by tennis players. Djokovic's "Ice, Ice, Baby" routine and Laura Robson's look of abject horror take the cake.
Roger Federer
Post by Roger Federer.
Rafael Nadal
Novak Djokovic
Grigor Dimitrov
Caroline Wozniacki
Sloane Stephens
Juan Martin del Potro
Laura Robson
John Isner
Victoria Azarenka
Andrea Petkovic
Ana Ivanovic:
Dustin Brown
Connecticut Tournament Director Anne Worcester and Petra Kvitova, with some help from Caroline Wozniacki and Simona Halep
Sam Querrey
Ryan Harrison
Jack Sock
Michael Russell
Todd Martin
Todd Martin's #IceBucketChallenge http://t.co/1lq8MqDUT5 @usta Pres Dave Haggerty, @katadams68 @LDavenport76 & #StanSmith - You're up!
— International Tennis Hall of Fame (@TennisHalloFame) August 14, 2014
Sara Errani
Post by Sara Errani.
Agnieszka Radwanska

Contributor, SI.com Nguyen is a freelance writer for SI.com, providing full coverage of professional tennis both on and off the court. Her content has become a must-read for fans and insiders to stay up-to-date with a sport that rarely rests. She has appeared on radio and TV talk shows all over the world and is one of the co-hosts of No Challenges Remaining, a weekly podcast available on iTunes. Nguyen graduated from the University of California, Irvine in 1999 and received a law degree from the University of California, Davis in 2002. She lives in the Bay Area.