London - World number one Ashleigh Barty progressed into the second round of Wimbledon on Tuesday beating Zheng Saisai of China 6-4, 6-2.
The 23-year-old Australian, bidding to become the first woman since Serena Williams in 2015 to win both the French Open and Wimbledon in the same season, did not have things all her own way being pegged back to 4-4 in the first set after leading 3-0.
However, she had too much in the locker for her opponent and easily took the second set to extend her unbeaten record to 13 matches.
Barty plays Belgium's Alison Van Uytvanck for a place in the last 32.
Wimbledon results on Tuesday (x denotes seeding):
Men
1st round
Sam Querrey (USA) bt Dominic Thiem (AUT x5) 6-7 (4/7), 7-6 (7/1), 6-3, 6-0
Dan Evans (GBR) bt Federico Del Bonis (ARG) 6-3, 7-6 (7/5), 6-3
Nikoloz Basilashvili (GEO x18) bt James Ward (GBR) 2-6, 4-6, 6-4, 6-4, 8-6
Nick Kyrgios (AUS) bt Jordan Thompson (AUS) 7-6 (7/4), 3-6, 7-6 (12/10), 0-6, 6-1
Kei Nishikori (JPN x8) bt Thiago Monteiro (BRA) 6-4, 7-6 (7/3), 6-4
Steve Johnson (USA) bt Albert Ramos (ESP) 6-4, 6-2, 6-3
Alex De Minaur (AUS x25) bt Marco Cecchinato (ITA) 6-0, 6-4, 7-6 (7/5)
Matteo Berrettini (ITA x17) bt Aljaz Bedene (SLO) 3-6, 6-3, 6-2, 7-6 (7/3)
Marcos Baghdatis (CYP) bt Brayden Schnur (CAN) 6-2, 6-4, 6-4
Women
1st round
Ashleigh Barty (AUS x1) bt Saisai Zheng (CHN) 6-4, 6-2
Alison Van Uytvanck (BEL) bt Svetlana Kuznetsova (RUS) 6-4, 4-6, 6-2
Harriet Dart (GBR) bt Christina McHale (USA) 4-6, 6-4, 6-4
Kaia Kanepi (EST) bt Stefanie Voegele (SUI) 5-7, 7-5, 6-4
Belinda Bencic (SUI x13) bt Anastasia Pavlyuchenkova (RUS) 6-2, 6-3
Lauren Davis (USA) bt Kateryna Kozlova (UKR) 6-3, 6-2
Angelique Kerber (GER x5) bt Tatjana Maria (GER) 6-4, 6-3
Laura Siegemund (GER) bt Katie Swan (GBR) 6-2, 6-4
Barbora Zahlavova (CZE) bt Lesya Tsurenko (UKR x32) 6-3, 6-2
Elise Mertens (BEL x21) bt Fiona Ferro (FRA) 6-2, 6-0
Monica Niculescu (ROU) bt Andrea Petkovic (GER) 2-6, 6-2, 7-5
Wang Qiang (CHN x15) bt Vera Lapko (BLR) 6-2, 6-2
Sloane Stephens (USA x9) bt Timea Bacsinszky (SUI) 6-2, 6-4
Wang Yafan (CHN) bt Tereza Martincova (CZE) 6-2, 7-5
Katerina Siniaková (CZE) bt Ekaterina Alexandrova (RUS) 2-6, 6-1, 6-1
Magda Linette (POL) bt Anna Kalinskaya (RUS) 6-0, 7-6 (11/9)