VIDEO: Juan Martin del Potro confronts spectator at Roland Garros

Don’t disturb Juan Martin del Potro while he is serving, okay? A spectator learned this the hard way at Roland Garros on Thursday.

The Argentine was taking on Marin Cilic in the quarter-final and was preparing to serve at 4-4 in the second set, but there was a disturbance in the crowd and he ended up serving a double fault which led to him dropping his serve.

He then went over to the spectator and had a word.

Del Potro ended up losing the second set 5-7, but he bounced back to secure a 7-6 (7-5), 5-7, 6-3, 7-5 victory and will play Rafael Nadal in the semi-final.