Venus Williams beat local favourite Kim Clijsters 6-2, 6-3 to reach the semi-finals of the Antwerp Diamond Games tournament.
Halep withdraws from Western & Southern Open with injury.
It was the former world number one's earliest loss at Wimbledon since she went out in the opening round on her debut here in 1997.
The Indian ace went down 3-6, 2-6 in the second round of the Stanford Classic women's singles tournament.
A abdominal strain forced the former world No.1 to withdraw from the elite eight-woman event.\n\n
Venus Williams won her 40th singles title on Saturday by defeating unseeded Virginie Razzano 6-4, 6-2 to win the Dubai Championships. It was the 28-year-old American's seventh triumph in her last eight finals, with her last title coming at the WTA Championships in Doha in November.
Sania Mirza set up a second round clash with multiple Grand Slam winner and second seed Venus Williams after edging past Sesil Karatantcheva 6-4, 6-4 in the first round of the US $1 million WTA Family Circle Cup in Charleston.
Wimbledon champion Venus Williams was pushed to the limit before beating third seed Jelena Jankovic of Serbia 4-6 6-1 7-6 on Wednesday to reach the US Open semi-finals.
The three-time former champion entered her sixth Wimbledon final, beating Serbian teenager Ana Ivanovic.
47-year-old Martina Navratilova and Lisa Raymond were also picked in the U.S. team for their Fed Cup first-round tie against Slovenia.
Spaniard Rafael Nadal, the Gentleman's Singles title winner and American Venus Williams, the Ladies' Singles champion, pose with their trophies at the Champions Dinner held at the Hotel Intercontinental Park Lane in London on Monday.
"I generally don't play with pain, but this is a Grand Slam and I just wanted to win," said the American.\n\n
Despite her poor recent track record against her sister Serena, Venus Williams will not just be "hanging out" in her first Grand Slam final in nine years at the Australian Open on Saturday.
Italy's Flavia Pennetta stunned Wimbledon champion Venus Williams with an impressive 6-4 7-6 win to reach the Bangkok Open final.
The US faces the Czech Republic in the first round from April 26-27.
Venus Williams proved she was still a force to be reckoned with after a two-year battle with injuries and illness as she downed Romania's Monica Niculescu 6-2, 6-3 to win the Luxembourg Open title on Sunday.
Former US Open champion Venus Williams withdrew from the last Grand Slam of the year on Wednesday, revealing she is suffering from an autoimmune disease.
Former French Open winner Ana Ivanovic will draw on lessons from her last Wimbledon clash with Venus Williams when she plays the five-time champion on Monday for a place in the quarter-finals.
All her physical failings could well be a psychological weak spot that ends up driving her out of tennis.
Venus Williams was knocked out of the US Open on Wednesday while Andy Murray raced through an entertaining drubbing.
The seventh-seeded American next plays top seed Shahar Peer of Israel at the Memphis International.
Images from all the action on Day 9 of the Australian Open at Melbourne Park on Tuesday
Images from cation on day nine of the US Open being played at the Flushing Meadows.
Roger Federer was lucky to keep alive his dream of winning a maiden Roland Garros crown and Venus Williams used a good night's sleep to spare herself from a French Open nightmare in the second round on Thursday.
Serena and Venus Williams lost 3-6, 6-4, 6-2 to former champions Yan Zi and Zheng Jie in the quarter-finals.
Aravane Rezai blasted her way to the biggest singles title of her career when she stunned fourth seed Venus Williams 6-2, 7-5 in the Madrid Open final on Sunday.
Denmark's Caroline Wozniacki and the evergreen Venus Williams won their semi-finals at the Auckland Classic on Friday to set up a final showdown between two former World No 1s.
Former world number one Venus Williams produced a vintage display to outclass Netherlands' Arantxa Rus in straight sets and storm into the second round of the Yarra Valley Classic.
Venus Williams beat Czech Lucie Safarova 6-1, 6-4 in the second round of the Italian Open
Venus Williams earned her first victory of 2006 when she defeated Urszula Radwanska 6-3, 6-3 to reach the second round in Warsaw.
Venus Williams is a two-time mixed doubles winner at Grand Slams, triumphing at the Australian Open and Roland Garros in 1998.
The U.S. Open witnessed a major shock without a ball being struck in anger on Wednesday when Venus Williams quit the tournament after revealing she was suffering from an illness that could threaten her tennis future.
Holder Venus Williams completed her circuitous route to the WTA Championships final, beating Serbia's Jelena Jankovic 5-7, 6-3, 6-4 on Saturday to set up yet another showdown with sister Serena. Serena, who will end the year as world number one for the first time since 2002, got past Caroline Wozniacki after the Dane pulled out with a stomach injury when trailing 6-4, 0-1.
Venus Williams beat top seed Angelique Kerber on Wednesday to advance to a Miami Open semi-final against Britain's Johanna Konta.
Unseeded Sloane Stephens got the better of fellow-American Venus Williams in a thrilling contest to make it to her first Grand Slam final, at the US Open, in New York, on Thursday.
Venus Williams edged sister Serena 6-1, 2-6, 7-6 (3) on Friday to reach the final of the Dubai Championships.
'I think what Venus and her sister have given our sport is absolutely tremendous. The way they've elevated women's tennis is truly inspiring'
