The competition is free to enter online or via text. Runners-up prizes include Fred Perry kit. Highland Spring said the campaign is parts its aim to reinforce the link between sport and hydration.
Highland Spring has strong credentials when it comes to supporting tennis. It supports Murray as well as his brother Jamie, also a professional player, and is the official supplier to the Lawn Tennis Association.
Sally Stanley, Highland Spring's marketing director said: "Highland Spring is a long-standing supporter of British tennis and is committed to reinforcing the health benefits of staying hydrated during sport."
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