Novak Djokovic, winner of 24 Grand Slam singles titles, has tapped longtime rival Andy Murray as his new coach, the tennis star announced Saturday on social media. “They called us game-changers, risk-takers, history makers,” Djokovic said in a video.

Andy Murray is set to take up a surprise role as coach for long-time rival Novak Djokovic, the duo confirmed in a blockbuster announcement on Saturday.

Novak Djokovic announced that Andy Murray will be his coach for the offseason and Australian Open in a post to social media on Saturday.