Images:

http://walyou.com/roger-federer-tennis-gadgets/

http://forums.atomicmpc.com.au/index.php?showtopic=32161&st=80

http://the-slice.com/2010/10/tennis-halloween-costume-101-andy-murray/

http://www.tennispaper.com/fortennis/maria-kirilenko-wins-the-all-russian-all-adidas-battle-at-pilot-pen/