Ana Ivanovic quit Wimbledon in tears after sustaining a thigh injury during her fourth-round match with Venus Williams.

The thirteenth-seeded Ivanovic lost the first set 6-1, and then injured her thigh when serving in the first game of the second set. Ivanovic received treatment and returned to win that one game, but then quit the match.

Ivanovic was far from the favorite to win the encounter with twice defending champion Venus Williams, but the way she lost the match hurts the Serbian former world number one the most and her exit was very emotional.

Other fourth-round matches of the day: top seed Dinara Safina overcame seed No.17 Amelie Mauresmo in three sets 4-6 6-3 6-4, Venus’ sister Serena Williams, seeded second, got past Daniela Hantuchova 6-3 6-1. Fourth seed Elena Dementieva defeated fellow Russian Elena Vesnina 6-1 6-3, No.8 seed Victoria Azarenka beat No.10 seed Nadia Petrova 7-6(5) 2-6 6-3, 11th seed Agnieszka Radwanska stopped Melanie Oudin from progressing further.

Also, there were two upsets: ninth seed Caroline Wozniacki was beaten by Sabine Lisicki 6-4 6-4, and No.26 seed Virginie Razzano lost to Francesca Schiavone 6-2 7-6(1). (photo: Life)

Handsome golfer Adam Scott was spotted in Ana Ivanovic’s box, watching her second-round match against Sara Errani.

"I met her in Australia. But I'm not going to say any more," Scott said after the match.

Asked whether he'd be back to see more of Ivanovic, he said: "I sure hope so."

Scott has skipped the Tiger Woods AT&T National to join Ivanovic at Wimbledon.

Whether they are dating we still don’t know, but remember that Ivanovic's ex-boyfriend Fernando Verdasco was also watching her play from the stands, prior to the confirmation of their relationship.

Earlier this year Ivanovic and Scott were seen hanging out at the beaches of Queensland. (source: HCFoo's Tennis Blog)

Jelena Jankovic, who was stunned by 17-year-old Melanie Oudin in the third round of Wimbledon, didn’t want to blame her own lack of quality for the defeat and even characterized her opponent’s game as mediocre.

From what I have seen, she can play if you let her play. But she cannot hurt you with anything. She doesn't have any weapons, from what I've seen. She's a consistent and quite solid player. She doesn't make so many mistakes. But she doesn't do anything either, so it's like she's depending kind of on you.

These statements seem especially unacceptable when you consider that Oudin made 38 winners to Jankovic's 13.

I'm a Jankovic fan but she should have shown respect for her opponent and accepted her own decline, despite the diziness that affecteed her during the match. (source: Tennis Head, photo: Life)

Fifth seed Svetlana Kuznetsova did not let sixth seed Jelena Jankovic hold the title of the biggest upset in the first week of Wimbledon for long, as she quickly followed her out by losing to Sabine Lisicki 6-2 7-5.

The world No.41 Lisicki won the first set in 37 minutes and established a 5-2 lead in the second. Kuznetsova then fought back and even served at 5-6, 40-love for the tiebreak, but Lisicki broke Kuznetsova and finished the match on her fifth match point.

Unseeded Lisicki reached the fourth round of a Grand Slam for the first time by beating Kuznetsova, who has today turned 24.

In the fourth round Lisicki will play ninth seed Caroline Wozniacki, who easily defeated 20th-seeded Spaniard Anabel Medina Garrigues 6-2 6-2. (photo courtesy of our reader Jacob)

Sixth seed Jelena Jankovic fell in the third round of Wimbledon 2009 to American world No.124 Melanie Oudin 6-7 (8) 7-5 6-2, while her fellow Serb Ana Ivanovic made a better showing than usual and advanced to the fourth round.

The former world No.1 Jankovic lost to qualifier Oudin in three sets, but even that first set she won in a tiebreaker could have easily went into the hands of Oudin who had four set points. The second set was equally intriguing. Oudin overcame a 5-4 deficit and since then the match turned into the biggest upset of the first week of Wimbledon.

Oudin has been making her Wimbledon debut this week, and before she had a 0-2 record in Grand Slam matches. After the tournament the 17-year-old will crack the Top 100 for the first time.

Ana Ivanovic had a much more difficult opponent in her third-round match, in the form of Roland Garros semifinalist Samatha Stosur, ranked 19th in the world. The 13th-seeded Ivanovic beat Stosur 7-5 6-2 and will next face the most difficult opponent, five-time Wimbledon titlist and defending champion Venus Williams.

Ivanovic took the Australian’s serve in the first game and marched on for a 4-2 lead. Stosur then leveled at 4-4, but Ivanovic broke again and served out for the set. In the second set Ivanovic raced to a 4-0 lead, and it was clear she would advance and finally show us she can still play solidly. (photo: Ralf Reinecke)