Paris, France (Sports Network) - Serena Williams' domination of women's tennis continued Sunday with a straight-set win over Italy's Roberta Vinci in the fourth round of the French Open.
The top-seeded Williams rolled to a 6-1, 6-3 triumph and extended her career- best winning streak to 28 straight matches. She hasn't lost since falling to Victoria Azarenka in the Doha final back in February and entered the second Grand Slam of the year off titles in Miami, Charleston, Madrid and Rome.
Sunday's victory gave Williams a 20-0 mark on clay this year. She also improved to 71-3 overall since a stunning first-round loss to Virginie Razzano in last year's French Open, and has dropped just 10 games through the first four rounds of this year's stay at Roland Garros.
The 15th-seeded Vinci has given Williams the most trouble thus far by taking four games. However, it really wasn't much of a contest. Williams won the first four games and captured the opening set in 29 minutes. The second set was closer, but Williams won the final 10 points of the match.
Next up for the 15-time Grand Slam champ is Russian veteran Svetlana Kuznetsova, a 6-4, 4-6, 6-3 upset winner over eighth-seeded German Angelique Kerber.
Kuznetsova won the 2009 French Open, beating Williams in the quarterfinals along the way, and was the runner-up in 2006. She has reached her second Grand Slam quarterfinal in as many tries this year after a trip to the final eight at the Australian Open in January, but hasn't won a tournament of any kind since 2010 in San Diego.
Williams, the 2002 French champ, owns a 6-2 lifetime mark against Kuznetsova, but the two haven't met since 2009 at the Tour Championships in Qatar.
Two more fourth-round matches are on tap for Sunday, as 2012 runner-up Sara Errani of Italy will meet Spain's Carla Suarez Navarro and fourth-seeded Agnieszka Radwanska will take on 2008 French winner Ana Ivanovic.