Serena Williams wins in Rome
Williams has won titles in Charleston, S.C., and Madrid -- plus two victories in Fed Cup.
Need the scores from any match played in today's tournaments? Results
Considering all the tennis Serena Williams has played during her streak, she didn't have much time after finishing her first-round win over Galina Voskoboeva near midnight Tuesday.
"It wasn't that easy. It was a quick turnaround," Serena said. "When I saw the schedule, I said, 'Oh my God, are you serious?' That's life. You just have to be able to adjust and make the best of it, and so I was really happy to come through today."
However, Serena appeared to struggle with her back at times.
"Everyone has aches and pains here and there, and today I felt it a lot because I have been playing a lot and practicing even more," she said.
Williams next faces fifth-seeded Sam Stosur, who defeated Sara Errani 6-3, 7-5.
Radwanska was beaten by 28th-ranked Petra Cetkovska of the Czech Republic 6-4, 4-6, 6-1; Wozniacki retired with upper respiratory illness while trailing 6-4, 4-0 to Anabel Medina Garrigues of Spain; and Bartoli was eliminated 6-3, 6-1 by Julia Goerges of Germany.
Information from The Associated Press was used in this report.
MORE TENNIS HEADLINES
- Serena feeling fine after virus at Wimbledon
- Lorenzi beats 2-time Kitzbuehel champ Haase
- Tiafoe, 16, ousted in ATP debut at Citi Open
- Top seed Isner wins 2nd straight Atlanta title