Wimbledon 2017: Djokovic through after Martin Klizan retires, Juan Martin del Potro wins
Former champion Novak Djokovic needed just 40 minutes to reach the second round at Wimbledon after Martin Klizan retired in the second set.
Djokovic, the second seed, led 6-3 2-0 when the Slovakian approached the net and called it a day.
The Serb goes on to face Czech Adam Pavlasek in the second round on Thursday.
Seven-time champion Roger Federer will play Ukraine's Alexandr Dolgopolov later on Tuesday.