Grand Slam champion Novak Djokovic has announced Andy Murray as his new head coach in a shocking development. The Serbian star has been without a head coach since parting ways with Goran Ivanisevic.

Eurosport tennis expert Alex Corretja has backed Andy Murray to succeed as Novak Djokovic’s new trainer. Djokovic recently made the surprise announcement that Murray, who only retired this year, would be teaming up with him as trainer. The 37-year-old has fallen down the world rankings of late, and is currently world No. 8 in men’s tennis.

Delgado was assistant coach under Ivan Lendl to Murray when he won his second Wimbledon title in 2016 before he went on to finish the year as world No.1. He reckoned the job is a “great challenge that Andy will relish” and with Djokovic perhaps entering his final season: “If Andy was going to do this, he had to do it now.”