Paris - As the chilly evening air swirled, and raindrops fell, and the thousands of spectators pulling for his opponent hushed, Novak Djokovic stood a single point from exiting the French Open.

A single point from losing to France's Jo-Wilfried Tsonga in the quarterfinals at Roland Garros.

A single point from losing the chance to pursue a fourth consecutive Grand Slam title, something no man has done in 43 years.

Steeling himself with so much at stake, Djokovic came through, taking that crucial point thanks to an overhead that skimmed off the baseline to set up a putaway volley. Seconds later, he faced the same predicament - one point from defeat - and came through again, this time with a leaping forehand that barely landed in. All told, Djokovic faced four match points against Tsonga and won each one, extending the contest until seizing control for good.

Djokovic won his 26th Grand Slam match in a row Tuesday, coming back and beating the fifth-seeded Tsonga 6-1, 5-7, 5-7, 7-6 (6), 6-1 to set up a French Open rematch against 16-time major champion Roger Federer. A year ago in the semifinals at Roland Garros, Federer ended Djokovic's 43-match winning streak, the last time the Serb lost at one of tennis' four most important tournaments.

"Tennis is very mental. Lots of emotions," said the No. 1-ranked Djokovic, who won Wimbledon last July, the U.S. Open last September, and the Australian Open in January. "If you're playing a top player, a home favorite, and you have a crowd that's supporting him, you have to face these things. Physically, we're all fit, all hitting the ball well. But mentally, it's just a matter of a point here, a point there. That's sport. The one that mentally pushes more in some moments - and gets a bit lucky - gets the win."

Federer also fashioned a come-from-behind victory, and while he never was confronted with a match point, he did drop the first two sets before getting past No. 9 Juan Martin del Potro of Argentina 3-6, 6-7 (4), 6-2, 6-0, 6-3.

After taking that big lead, del Potro - who upset Federer in the 2009 U.S. Open final - appeared to be hampered increasingly by a left knee that was heavily wrapped in white tape, although he refused to place any blame there afterward.

"He called the trainer, but he didn't take a timeout, so I didn't know what they were talking about, if he got painkillers, or what happened. So I was just trying to focus on me, really, because I was in trouble. He wasn't," said Federer, who won his only French Open title in 2009.

"Maybe his knee was (a problem). I don't know," Federer continued. "But doesn't matter how bad that knee is. Maybe he can just sit on it and just say, "OK, here, take the two next sets ... and then I'll come back in the fifth set and I will destroy you."'

The pivotal moment, then, was the fifth set's opening game, a 10-minute test. Del Potro held a break point, but Federer dismissed it with a forehand winner, then held.

Del Potro called that his "chance to win," and deemed Federer's response there "huge."

The pair of riveting five-set men's quarterfinals were quite a feast for fans after the light fare of the women's straight-set quarterfinals.

No. 21 Sara Errani of Italy entered Tuesday with an 0-28 record against top-10 opponents but reached her first Grand Slam semifinal by defeating No. 10 Angelique Kerber of Germany 6-3, 7-6 (2). Errani's best results have come in doubles, and she's also into the French Open semifinals of that event with Roberta Vinci.

Errani now faces U.S. Open champion Sam Stosur, who is seeded sixth. Stosur eliminated No. 15 Dominika Cibulkova of Slovakia 6-4, 6-1, taking the last six games and 13 of 14 points in one stretch.

Asked whether she's surprised Errani made it this far, Stosur replied: "No, not necessarily."

The last quarterfinals are today: No. 2 Maria Sharapova vs. No. 23 Kaia Kanepi, No. 4 Petra Kvitova vs. 142nd-ranked qualifier Yaroslava Shvedova, No. 2 Rafael Nadal vs. No. 12 Nicolas Almagro, and No. 4 Andy Murray vs. No. 6 David Ferrer.

Nadal is trying to become the first man to win seven French Open championships.

Djokovic is chasing history, too: Only two men, Don Budge in 1938 and Rod Laver in 1962 and 1969, claimed four major trophies in succession. They did it within a calendar year. Djokovic's feat wouldn't be considered a true Grand Slam because it's spread over two seasons, but it would be remarkable, nonetheless.