Bob Brett has resigned as director of player development at the Lawn Tennis Association and will leave his role at the end of the month.
The Australian has been working with the LTA since early 2014, when he evaluated British tennis and implemented changes allowing boys and girls to compete against players across the world in their age range.
Brett, who previously coached Boris Becker, Goran Ivanisevic and Marin Cilic, said: “I have enjoyed my time at the LTA working with some very talented players, coaches, sports science and sports medicine experts.