We've teamed up with Slazenger, the leading tennis brand, to offer you a fantastic prize during the US Open.
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This year will see Andy Murray head back to Flushing Meadows to defend his maiden Grand Slam title. To show our support and celebrate Andy's historic victory at Wimbledon earlier this summer, we're offering you the chance to win five tins of the official 2013 Slazenger Wimbledon balls!
The Slazenger Wimbledon ball uses an exclusive Ultra Vis dye and patented application process, creating a ball that has optimum visibility for players and spectators. The Tour Core has been engineered to deliver the consistent performance characteristics demanded by the world's most prestigious tennis tournament.
The official 2013 Slazenger Wimbledon balls (four balls per tin) are available to buy from store.slazenger.com.
All you have to do to be in with a chance of winning the set of balls, is answer this simple question:
Andy Murray defeated Novak Djokovic in last year's US Open final, but who did he beat at the semi-final stage?
Email your answers to: email@example.com with the subject line 'Tennis ball competition'.
Include your name and address so we can contact you if you win. This information will not be used for marketing purposes.
The closing date is Wednesday September 4.