PARIS, France - The Williams sisters shook off singles losses and won their fourth Grand Slam doubles title in a row, taking the French Open title with a 62 63 win over Kveta Peschke and Katarina Srebotnik.

The Williams sisters, seeded No.1, won the first four games of the match and barely looked back, a break against them early in the second set their only hitch. They were playing No.12 seeds Peschke and Srebotnik for the first time.

It was the Williams sisters' 12th Grand Slam doubles crown, adding to four previous Australian Opens (2001, 2003, 2009, 2010), one French Open (1999), four Wimbledons (2000, 2002, 2008, 2009) and two US Opens (1999, 2009). It was their fourth in a row - they haven't lost a Grand Slam match since the third round of last year's French (to Bethanie Mattek-Sands and Nadia Petrova).

"It's really tough when you play one Williams. When you play two, it's really not an easy win," Venus said. "Kveta and Katarina played really well this whole tournament. We just played the big points a little bit better today.

"Doubles for us isn't just for fun - we're playing for the title."

"It feels great. I mean, we have a Williams Slam," Serena said on the four straight majors. "When you're out there playing singles, it's a great feeling. But to play doubles with your sister, your flesh and blood, that's even better."

"We're the longest standing doubles team. We've been playing since the '80s," Venus said. "We've got quite a record. We don't even remember the first time."

"I remember a couple of things," Serena replied. "My dad told Venus to cross more, so I think she got upset and crossed when the person was serving. She ended up volleying the serve. It was so funny. My dad, he's so positive, he was like, 'Oh, no, no, Venus, not that. Just wait until after the serve.'

"I promise you, every tournament I think about that when we're in doubles."

"I remember that," Venus added.

Venus and Serena are the third-most successful partnership in the Open Era in terms of Grand Slam doubles titles won together, after Martina Navratilova and Pam Shriver (20) and Gigi Fernandez and Natasha Zvereva (14).

Given their semifinal win over Liezel Huber and Anabel Medina Garrigues, the Williams sisters will be co-world No.1s on the doubles rankings starting next week, taking over from Huber. Serena Williams will be the sixth player ever to hold No.1 in both singles and doubles simultaneously, after Navratilova (who did it for 103 weeks), Arantxa Sánchez-Vicario (7 weeks), Martina Hingis (29 weeks), Lindsay Davenport (3 weeks) and Kim Clijsters (3 weeks).

Peschke and Srebotnik, who won Indian Wells together earlier this year, had beaten No.6 seeds Cara Black and Elena Vesnina and No.2 seeds Nuria Llagostera Vives and María José Martínez Sánchez to reach the final in their first Grand Slam tournament as a team.

A day earlier on Court Philippe Chatrier, Srebotnik captured her fourth Grand Slam mixed doubles title alongside Nenad Zimonjic.