Novak Djokovic shatters Tsonga's dream, Federer in narrow victory over Del Potro

Novak Djokovic saved four match points and came back to beat Jo-Wilfried Tsonga 6-1, 5-7, 5-7, 7-6 (6), 6-1 in the French Open quarterfinals Tuesday, moving closer to a fourth consecutive Grand Slam.

The No. 1-ranked Djokovic's next opponent is 16-time major champion Roger Federer. It's a rematch of their semifinal at Roland Garros last year, when Federer ended the Serb's 43-match winning streak.

Since then, Djokovic has won 26 Grand Slam matches in a row, including titles at Wimbledon and the U.S. Open last year, and the Australian Open in January. No man has won four straight major championships since Rod Laver in 1969.

France's Tsonga broke Djokovic to end the second and third sets, then held match points at 5-4 and 6-5 in the fourth.

Elsewhere, Roger Federer came back from a two-set deficit for the seventh time in his career and beat Juan Martin del Potro 3-6, 6-7 (4), 6-2, 6-0, 6-3 to reach his record-equalling 31st Grand Slam semi final.

Federer already owns 16 major titles, including a Roland Garros title in 2009, but has gone more than two years without adding to that record total.

Del Potro, whose only Grand Slam title came by beating Federer in the 2009 US Open final, was bothered by his heavily wrapped left knee on Tuesday.

Federer got better and better as the match progressed. He was pretty much perfect in the fourth set, with 13 winners and zero unforced errors.