Defending champion Amelie Mauresmo and third seed Jelena Jankovic were both dumped out of Wimbledon on Tuesday.

In a rain-interrupted fourth-round clash Czech teenager Nicole Vaidisova edged a scrappy enounter against Mauresmo, eventually winning 7-6 (8-6) 4-6 6-1 on Centre Court.

Neither player was at their best - Mauresmo producing 14 doubles faults in all - but Vaidisova played the more consistent tennis in the final set to seal her surprise victory.

Mauresmo will look back on three missed set points when she led the first-set tie-break 6-3.

Had she won that it may have been a different story, but it was to be Vaidisova's day.

It was Marion Bartoli who stunned third seed Jankovic in three sets on Court One to reach the quarter-finals.

Bartoli produced a powerful display despite carrying a hip injury to upset the Serbian world number three 3-6 7-5 6-3.

In an incredible match delayed many times by the wet weather only 13 games went with serve out of 30.

Ana Ivanovic will face Vaidisova in the quarter-finals after she defeated Nadia Petrova 6-1 2-6 6-4 on Court Two.

The talented Serbian, a former Wimbledon junior champion, raced to the first set 6-1 with a performance that suggested the contest could be over fairly quickly.

However, the 11th-seeded Russian regained her composure to win the second set 6-2 before Ivanovic came from a break down to edge the decider following a rain break.

Svetlana Kuznetsova was the first winner of the day earlier on.

The fifth seed raced to a 6-3 6-2 victory over 16-year-old Tamira Paszek as the Austrian's impressive run finally came to an end.

Kuznetsova did not face a break point in the entire match with a rain break after the first set the only factor which held up her progress to the last eight.

There she will play either Venus Williams or Maria Sharapova who played only three points of their fourth round match on Court Three, before heavy rain halted play for the day.

In the men's singles Juan Carlos Ferrero will play Roger Federer in the quarter-finals after enjoying a straight-sets win on Court Three.

The former world number one and 2003 French Open champion eased past Serbian opponent Janko Tipsarevic 7-5 6-3 7-6 (7-5) to continue his best-ever Wimbledon run.

Dodging a series of short rain delays, Ferrero maintained his momentum well and managed to fight his way back from a break down in the third set to clinch a tight tie-break and seal the match.

"I know it will be difficult because he (Federer) has a good record here, but I have nothing to lose tomorrow so I will try my best," said Ferrero. "I am playing well and he is human, so I'm confident."

"My goal in the beginning when I saw the draw was to get to the quarter-final, but now my goal is to win tomorrow," Ferrero added.

"I don't have to think that tomorrow is going to be my last match of the tournament."

A round behind, former champion Lleyton Hewitt defeated Guillermo Canas in four sets to reach the last 16.

The fiery baseliner didn't find things easy against the Argentinian, who was playing in his first Wimbledon since 2004 due to a 15-month drugs ban.

Resuming at one set all, the third set went against the mould of the previous two as both players struggled with their service - only four games went with serve in the whole set before Hewitt took it 6-3.

Following another break for rain Hewitt won the fourth set to complete a 6-4 3-6 6-3 6-4 victory.

Two third round matches are still to finish because of the rain, with Rafael Nadal and Robin Soderling still on court in a match they started warming up for on Saturday.

When the covers came on for the final time, Nadal was serving the first point at 4-4 in the final set.

Also to finish their third round are Nicolas Kiefer and Novak Djokovic who are locked together at one set all after winning a tie-break each.

On Court 13, Nikolay Davydenko recorded an impressive victory over rising French star Gael Monfils to reach the fourth round for the first time.

The sixth seed has never been one for the grass - he had won just two matches on the surface in his career before arriving here - but things have changed over the past week, although his 6-3 7-5 6-3 win over Monfils had not been expected.

Monfils banged down 12 aces, but Davydenko, one of the best returners in the game, was still able to convert six of seven break points.

He will now face last year's semi-finalist Marcos Baghdatis.