Paris - Fifth seed Alexander Zverev moved into the third round of the French Open on Thursday with a comfortable 6-1, 6-3, 7-6 (7/3) win over Swedish qualifier Mikael Ymer.
The 22-year-old German has struggled to make an impact at the Grand Slam tournaments despite winning three Masters titles and last year's ATP Finals.
His best major effort came in Paris when he lost in the quarter-finals 12 months ago.
Zverev needed five sets to get past dogged Australian John Millman in the first round, but had no such troubles against world number 148 Ymer as he booked a last-32 clash with either Serbian 30th seed Dusan Lajovic or French qualifier Elliot Benchetrit.
Results from the fifth day of the French Open on Thursday (x denotes seeding):
Men
2nd round
Salvatore Caruso (ITA) bt Gilles Simon (FRA x26) 6-1, 6-2, 6-4
Dominic Thiem (AUT x4) bt Alexander Bublik (KAZ) 6-3, 6-7 (6/8), 6-3, 7-5
Pablo Cuevas (URU) bt Kyle Edmund (GBR x28) 7-6 (7/3), 6-3, 2-1 -- retired
Leonardo Mayer (ARG) bt Diego Schwartzman (ARG x17) 4-6, 6-3, 6-4, 7-5
Women
2nd round
Naomi Osaka (JPN x1) bt Victoria Azarenka (BLR) 4-6, 7-5, 6-3
Katerina Siniaková (CZE) bt Maria Sakkari (GRE x29) 7-6 (7/5), 6-7 (8/10), 6-3
Ashleigh Barty (AUS x8) bt Danielle Collins (USA) 7-5, 6-1
Iga Swiatek (POL) bt Wang Qiang (CHN x16) 6-3, 6-0
Amanda Anisimova (USA) bt Aryna Sabalenka (BLR x11) 6-4, 6-2
Ekaterina Alexandrova (RUS) bt Samantha Stosur (AUS) 3-6, 6-1, 6-4
Aliona Bolsova (ESP) bt Sorana Cirstea (ROM) 7-6 (7/5), 7-6 (7/3)
Belinda Bencic (SUI x15) bt Laura Siegemund (GER) 4-6, 6-4, 6-4