London - Wimbledon title favourite Karolina Pliskova crashed to a shock second round defeat against world number 108 Magdalena Rybarikova on Thursday.
Rybarikova battled back from a set down to win 3-6, 7-5, 6-2 on Centre Court, earning the Slovakian a last 32 clash with Ukraine's Lesia Tsurenko.
Pliskova reached the US Open last year and the French Open semi-finals last month, but the Czech world number three has a dismal record at Wimbledon and for the sixth successive year she failed to get past the second round.
Wimbledon results on Thursday, the fourth day of the 2017 championships at the All England Club (x denotes seeding):
Men
2nd rd
Grigor Dimitrov (BUL x13) bt Marcos Baghdatis (CYP) 6-3, 6-2, 6-1
Dudi Sela (ISR) bt John Isner (USA x23) 6-7 (5/7), 7-6 (7/5), 5-7, 7-6 (7/5), 6-3
Mischa Zverev (GER x27) bt Mikhail Kukushkin (KAZ) 6-1, 6-2, 2-6, 3-6, 6-4
David Ferrer (ESP) bt Steve Darcis (BEL) 3-0 -- retired
Gael Monfils (FRA x15) bt Kyle Edmund (GBR) 7-6 (7/1), 6-4, 6-4
Ernests Gulbis (LAT) bt Juan Martn Del Potro (ARG x29) 6-4, 6-4, 7-6 (7/3)
Novak Djokovic (SRB x2) bt Adam Pavlsek (CZE) 6-2, 6-2, 6-1
Women
2nd rd
Polona Hercog (SLO) bt Varvara Lepchenko (USA) 6-7 (2/7), 6-2, 6-2
Svetlana Kuznetsova (RUS x7) bt Ekaterina Makarova (RUS) 6-0, 7-5
Lesya Tsurenko (UKR) bt Viktorija Golubic (SUI) 6-1, 2-6, 6-3
Coco Vandeweghe (USA x24) bt Tatjana Malek (GER) 6-4, 6-2