Novak Djokovic’s son was seen helping his father warm up for his second round match against Jacob Fearnley at Wimbledon.
Nine-year-old Stefan took part in catching practice as the seven-time champion worked out with a medicine ball.
Djokovic faces Britain’s Fearnley - who won his opening match against Alejandro Moro Canas - on Thursday 4 July.
They will go toe-to-toe on centre court.
Fearnley will be the sixth British player to face Djokovic at Wimbledon, with Andy Murray the only one to beat him.