Novak Djokovic paid tribute to his long-time rival Roger Federer on Friday, hailing the “incredible moments and battles” the pair shared on court. 

Federer, a 20-time Grand Slam champion, announced on Thursday that he would retire after next week’s Laver Cup. “Roger, it’s hard to see this day and put into words all that we’ve shared in this sport together,” Djokovic wrote on Instagram, saying they had “over a decade of incredible moments and battles to think back on”.