London, England (Sports Network) - Roger Federer continued his dominant play at the ATP World Tour Finals with a three-set victory over Jo-Wilfried Tsonga in Sunday's title match.
Playing in his 100th career final, Federer outlasted Tsonga 6-3, 6-7 (6-8), 6-3 to win the season-ending tournament for a record sixth time. The only other tournament he has won six times is Wimbledon.
The Swiss superstar also picked up his 39th career victory in the Tour Finals, tying him for the most all-time with Ivan Lendl.
Federer now owns an 8-3 record against Tsonga all-time, including 6-2 in 2011, and beat the Frenchman earlier this week in group play.
"I thought I played well. I thought Jo played well," Federer said. "Could I have won it easier? I guess. I had it in my hands. I had a chance to go a double break in the second. I had chances to serve it out. I had chances in the tie-breaker. It wasn't meant to be. I had to go through the third set, which was tough, but eventually I made it, which felt probably even better going through three sets. The relief was amazing. The joy, of course, as you can imagine, was great."
The 30-year-old Federer went unbeaten in three matches during round-robin play this week to win Group B, then defeated David Ferrer in the semifinals on Saturday.
He has won 17 straight matches dating back to a loss to Novak Djokovic in the semifinals of the U.S. Open.
Federer also became the oldest player to win this title. Ilie Nastase was 29 years old when he won in 1975.
The Swiss superstar, who claimed his 70th career title on Sunday, went 4-2 in finals this year. He ended the season with a 64-12 record.
Tsonga, who went 2-1 in Group B Round Robin play, recorded a 6-3, 7-5 win against Tomas Berdych in the semifinals.
Tsonga was trying to become the first Frenchman ever to win this tournament. Only one other Frenchman has even reached the final -- Sebastien Grosjean, who was runner-up in 2001 to Lleyton Hewitt in Sydney.
The 26-year-old Tsonga appeared in a career-best six finals this season (2-4). He ended the year with a 55-24 mark.
"Today I fought all I can. I'm just happy tonight because I had a good week," Tsonga said. "Of course, to win is better but I gave everything. Tonight I can look [at] myself in the mirror and say, 'Yeah, you fought enough.'"
In the doubles final, which preceded the singles final, Max Mirnyi and Daniel Nestor took down Mariusz Fyrstenberg and Marcin Matkowski 7-5, 6-3.
Mirnyi and Nestor dominated the competition this week, going 3-0 in their round robin group (including a win over Fyrstenberg and Matkowski) then beating No. 1 seeds the Bryan brothers in the semifinals.
It was their first time playing this tournament together. The veteran duo went 4-4 in title matches this season.
11/27 18:19:52 ET