Gabrine Muguruza of Spain celebrates after defeating Varvara Lepchenko of the United States in her first round Women's Singles match on Day One of the 2017 US Open at the USTA Billie Jean King National Tennis Center on August 28, 2017 in the Flushing neig
She was never in any trouble on Arthur Ashe against the unseeded American Lepchenko as she completed the victory in one hour and three minutes, hitting 16 winners, more than double her opponent.
She will play the winner of the match between Duan Ying-Ying of China and American qualifier Claire Liu
Muguruza and Kvitova express delight after wins on opening day
13th seed and former world number one Petra Kvitova enjoyed a straight sets 7-5 7-5 win over Jelena Jankovic.
Kvitova battles past Jankovic
Kvitota has reached the second round of all three grand slams she has played since returning to action in May, following a lengthy injury layoff.
"We had a few tough battles in the past, and I'm just happy to get through this tricky match," said Kvitova. who lost to the Serbian player as defending Wimbledon champion in the third round at the All England Club in 2015.
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18th seed Caroline Garcia was also a comfortable victor, coming through with a 6-0 6-1 win over Tereza Martincova of the Czech Republic in only 57 minutes.
Fifth seed Caroline Wozniacki capitalised on 41 unforced errors by Romanian Mihaela Buzarnescu to cruise to a 6-1 7-5 win in their first round meeting at the U.S. Open on Monday.
Wozniacki rolls through first round of US Open
The win was the former world number one's 100th grand slam match victory.