With its unique twist-and-lock technology, QLIPP analyses the spin, speed and sweet-spot accuracy of each shot and sends data to your smartphone in real-time.

For your chance to win, simply answer the question below by filling out the form on the right hand side of this page. (Hint: the answer can be found here).

How much does the QLIPP tennis sensor weigh? 

a) 8 grams
b) 18 grams
c) 28 grams

The closing date for entries is November 29. No cash alternative will be provided. Tennishead terms and conditions apply.

This competition is no longer open for entries. The winner has been drawn from all the correct entries received by the closing date.