London - Three-time champion Novak Djokovic reached the Wimbledon second round on Tuesday when Slovakian opponent Martin Klizan quit with a calf injury.
Second seed Djokovic was leading 6-3, 2-0 when Klizan retired after just 40 minutes on Centre Court.
Djokovic will face Adam Pavlasek of the Czech Republic for a place in the last 32.
Wimbledon results on Tuesday, the second day of the 2017 championships at the All England Club (x denotes seeding):
Men
1st rd
Mikhail Youzhny (RUS) bt Nicolas Mahut (FRA) 6-2, 7-5, 6-4
Mischa Zverev (GER x27) bt Bernard Tomic (AUS) 6-4, 6-3, 6-4
Ernests Gulbis (LAT) bt Vctor Estrella (DOM) 6-1, 6-1, 6-2
Adam Pavlsek (CZE) bt Ernesto Escobedo (USA) 6-7 (7/9), 6-1, 6-3, 6-1
Women
1st rd
Sorana Cirstea (ROM) bt Kiki Bertens (NED x23) 7-6 (7/4), 7-5
Bethanie Mattek-Sands (USA) bt Magda Linette (POL) 1-6, 6-2, 6-3
Magdalena Rybarikova (SVK) bt Monica Niculescu (ROM) 6-4, 6-1
Tatjana Malek (GER) bt Anastasia Potapova (RUS) 6-3, 2-2 -- retired
Coco Vandeweghe (USA x24) bt Mona Barthel (GER) 7-5, 6-2