Emma Raducanu has been warned to surround herself with positive influences. Former world No. 1 Caroline Wozniacki has been encouraged by Raducanu's appointment of Mark Petchey as her coach. But with Raducanu sifting through several trainers over the past few years, Wozniacki has urged the British star to surround herself only with trusted allies.

The current world No. 6, Novak Djokovic, recently has opened up about his brief coaching collaboration with Andy Murray. The partnership, which lasted six months, came to an end just days before Roland Garros,

The Geneva Open will serve as the pair's first official test together, with expectations high as Djokovic fine-tunes his game