Former World No 1 Victoria Azarenka and Roland Garros champion Jelena Ostapenko were among those to advance to the second round of Wimbledon on Monday evening.
Azarenka, who only recently returned to the big stage after giving birth to her first child in December, battled back from a set down to defeat CiCi Bellis 3-6, 6-2, 6-1.
American Bellis appeared to have the upper hand after racing to a 4-0 lead and holding on to take the first set, but Azarenka was able to gain a foothold in the match as it progressed.
An early break in the second set handed her a 3-0 lead, and she was able to follow that up with a second break with Bellis serving at 2-5 to level the scores.
The Belarusian then claimed two more breaks early in the decider to bring victory within reach. Bellis returned one of those lost breaks but them immediately gave it away again in the following game as Azarenka took a 5-1 lead with a service game to come.
It was all over when Bellis sent a forehand long, as Azarenka ended the match looking very impressive.
— Wimbledon (@Wimbledon) July 3, 2017
Next up for her in round two is 15th seed Elena Vesnina.
Ostapenko, meanwhile, came through a topsy-turvy encounter with Aliaksandra Sasnovich before emerging a 6-0, 1-6, 6-3 winner.
The French Open champion lost the second set just as convincingly as she'd taken the first, but was able to regather herself and take the decider courtesy of three breaks to two.
— Wimbledon (@Wimbledon) July 3, 2017
Other winners late on Monday included home favourite Johanna Konta, who beat Hsieh Su-wei 6-2, 6-2, and Carla Suarez Navarro, who sent Eugenie Bouchard packing 1-6, 6-1, 6-1.
Earlier in the day, there were wins for Venus Williams, Elina Svitolina, Simona Halep and Petra Kvitova.
All of Monday's first-round results
13-Jelena Ostapenko (Latvia) beat Aliaksandra Sasnovich (Belarus) 6-0 1-6 6-3
15-Elena Vesnina (Russia) beat Anna Blinkova (Russia) 6-4 5-7 6-2
25-Carla Suarez Navarro (Spain) beat Eugenie Bouchard (Canada) 1-6 6-1 6-1
Victoria Azarenka (Belarus) beat Catherine Bellis (U.S.) 3-6 6-2 6-1
Donna Vekic (Croatia) beat Natalia Vikhlyantseva (Russia) 6-7(6) 6-4 6-1
Peng Shuai (China) beat Marketa Vondrousova (Czech Republic) 6-7(5) 6-0 6-4
27-Ana Konjuh (Croatia) beat Sabine Lisicki (Germany) 6-1 6-4
18-Anastasija Sevastova (Latvia) beat Yulia Putintseva (Kazakhstan) 6-1 7-6(3)
Irina Begu (Romania) beat Naomi Broady (Britain) 6-4 6-2
Heather Watson (Britain) beat Maryna Zanevska (Belgium) 6-1 7-6(5)
6-Johanna Konta (Britain) beat Hsieh Su-Wei (Taiwan) 6-2 6-2
Ana Bogdan (Romania) beat Duan Yingying (China) 6-4 6-2
Francoise Abanda (Canada) beat Kurumi Nara (Japan) 6-2 6-4
Jennifer Brady (U.S.) beat Danka Kovinic (Montenegro) 6-3 6-1
Madison Brengle (U.S.) beat Richel Hogenkamp (Netherlands) 6-3 6-3
8-Dominika Cibulkova (Slovakia) beat Andrea Petkovic (Germany) 6-3 3-6 9-7
21-Caroline Garcia (France) beat Jana Cepelova (Slovakia) 6-1 6-1
Naomi Osaka (Japan) beat Sara Sorribes Tormo (Spain) 6-3 7-6(3)
11-Petra Kvitova (Czech Republic) beat Johanna Larsson (Sweden) 6-3 6-4
Maria Sakkari (Greece) beat Katerina Siniakova (Czech Republic) 6-3 6-4
Carina Witthoeft (Germany) beat 26-Mirjana Lucic-Baroni (Croatia) 6-3 5-7 8-6
Kristyna Pliskova (Czech Republic) beat 31-Roberta Vinci (Italy) 7-6(6) 6-2
22-Barbora Strycova (Czech Republic) beat Veronica Cepede Royg (Paraguay) 6-3 6-3
4-Elina Svitolina (Ukraine) beat Ashleigh Barty (Australia) 7-5 7-6(8)
Francesca Schiavone (Italy) beat Mandy Minella (Luxembourg) 6-1 6-1
10-Venus Williams (U.S.) beat Elise Mertens (Belgium) 7-6(7) 6-4
2-Simona Halep (Romania) beat Marina Erakovic (New Zealand) 6-4 6-1
Camila Giorgi (Italy) beat Alize Cornet (France) 5-7 6-4 6-4
Aryna Sabalenka (Belarus) beat Irina Khromacheva (Russia) 6-3 6-4
17-Madison Keys (U.S.) beat Nao Hibino (Japan) 6-4 6-2
Wang Qiang (China) beat Chang Kai-Chen (Taiwan) 6-3 6-4
Beatriz Haddad Maia (Brazil) beat Laura Robson (Britain) 6-4 6-2