The brainchilld of Emily Tonkin, a British designer based in California, 30Fifteen offers a range of stylish high performance kit exclusively for women. With simple, yet flattering designs, 30Fifteen's range of tennis dresses are ideal for women of all ages.

The most luxurious tennis dress in the 30Fifteen collection, the Alethia Dress has sweat and odour absorbent technologies, and a simple yet elegant cut to allow you to focus on your winning game.

Designed to flatter women with narrower hips, the detail lengthens the waist line and the high neck line offers additional coverage. 

Available in three colours with a built-in shelf bra, the dress comes with matching ball shorts. The moisture-wicking material absorbs sweat and odour and flat seams prevent chafing.

For your chance to win the Alethia Dress in grey and purple, simply answer the question below by filling in the form on the right hand side of this page.

The Alethia dress comes which which of the following features?

a) Built-in shelf bra
b) Matching ball shorts

c) Flat seams
d) All of the above

The Alethia dress also comes in Chalk & Blue and Grey & Pink. Click here to see the entire 30Fifteen collection.

Closing date for entries is April 30. 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.