Emma Raducanu has appointed Sebastian Sachs as her new coach.
The 30-year-old German, who guided Belinda Bencic to Olympic gold last year, has started working with the Briton, last year's US Open champion.
Sachs is in Abu Dhabi with Raducanu, who is set to play an exhibition match against the Wimbledon runner-up Ons Jabeur later on Friday.
The German had a brief career as a player on the Futures tour, but has enjoyed plenty of success as a coach.
Before helping Bencic into the world's top 10, he worked with Julia Gorges and before that as part of Victoria Azarenka's team.