PARIS — After letting 12 match points — 12! — slip away in the fourth set, 35-year-old Tommy Haas came back from a break down in the fifth and beat John Isner, 7-5, 7-6 (7-4), 4-6, 6-7 (10-12), 10-8, at the French Open Saturday.
The match lasted 4 hours, 37 minutes. That’s nothing, of course, compared with the 11-plus hours Isner played across three days during a record-breaking victory that went to 70-68 in the fifth set at Wimbledon in 2010.
Haas was one point away from winning 12 times late in the fourth set Saturday, but couldn’t close it out.
He was only 2 for 22 on break-point chances until converting his 23d of the match when Isner put a volley into the net. Haas then served out the victory.
The 12th-seeded Haas is the first man to reach the fourth round at Roland Garros at 35 since Jonas Bjorkman was that age in 2007. Yet by the end, he looked to be the fresher man against the 19th-seeded Isner, who is 28.
Rafael Nadal had to come from behind yet again and reached the fourth round by beating Fabio Fognini, 7-6 (7-5), 6-4, 6-4.
After dropping the opening set in his first two matches, Nadal trailed, 4-2, Saturday and was down a break at 6-5 before surging ahead for his 18th consecutive victory.
Nadal seeks to become first man to win eight titles at the same Grand Slam event. He improved to 55-1 at Roland Garros despite enduring some wobbly moments for the third match in a row.
Nadal committed 40 unforced errors and faced 11 break points. He next plays No. 13-seeded Kei Nishikori, who became the first Japanese man in 75 years to reach the fourth round at Roland Garros, beating Frenchman Benoit Paire, 6-3, 6-7 (3-7), 6-4, 6-1.
Paire had a set point while leading, 5-4, in the second and Nishikori serving. But Paire was given a point penalty by chair umpire Enric Molina for coaching, which is not allowed at Grand Slam tournaments, and Nishikori wound up holding serve.
Paire did manage to win that set, anyway, but he was broken in the last game of the third when he missed a drop shot.
Paire said his coach, Lionel Zimbler, was merely putting his hands in the air to offer encouragement.
Novak Djokovic received a visit from a trainer late in his third-round match, then completed a victory over No. 26-seeded Grigor Dimitrov, 6-2, 6-2, 6-3.
Walking to his changeover chair at 4-3 in the last set, Djokovic stretched his right arm several times and then was treated by the trainer, who applied ointment and massaged the Serb’s upper arm. Djokovic then won the final two games to close out the victory against a player who beat him in the Madrid final last month.
A six-time Grand Slam champion, Djokovic earned his 500th tour victory. The French Open is the only major tournament he has yet to win, and he’s trying to become the eighth man to complete a career Grand Slam.
On the women's side, Jamie Hampton of the United States stunned 2011 Wimbledon champion Petra Kvitova of the Czech Republic, 6-1, 7-6 (9-7), to reach a Grand Slam fourth round for the first time.
The 54th-ranked Hampton, who lives in Auburn, Ala., needed only 13 winners because the seventh-seeded Kvitova finished with 33 unforced errors, 15 more than the American. Kvitova was a French Open semifinalist in 2012.
Hampton joined 67th-ranked Bethanie Mattek-Sands and No. 17-seeded Sloane Stephens, who both won earlier Saturday, and No. 1 Serena Williams, who won Friday, in the fourth round. That gives the US its most women at this stage at Roland Garros since 2004, when there were also four.
Five US women made it to the fourth round in Paris in 2003.
The 17th-seeded Stephens reached the fourth round for the second consecutive year by beating Marina Erakovic 6-4, 6-7 (5-7), 6-3. Stephens won the last three games against Erakovic, who was penalized a point in the third set for getting coached.
A year ago, Stephens became the first US teenager to reach the fourth round at Roland Garros since Serena Williams in 2001. She followed that up by reaching her first Grand Slam semifinal at the Australian Open this January, beating Williams to get there.
‘‘This is my favorite tournament,’’ said Stephens, now 20, ‘‘so I would really, really, really love to win.’’
Mattek-Sands beat qualifier Paula Ormaechea, 4-6, 6-1, 6-3.
Former top-ranked player Jelena Jankovic beat ninth-seeded Sam Stosur of Australia, 3-6, 6-3, 6-4.
Maria Sharapova overcame eight double faults, an erroneous ruling that gave her a double fault, and a second-set deficit to beat Zheng Jie, 6-1, 7-5.
Third seed Victoria Azarenka defeated Alize Cornet, 4-6, 6-3, 6-1.