Second and third seeds Jelena Jankovic and Daniela Hantuchova were sent spinning from the Amelia Island tennis championship on Friday.
Top seed Jelena Jankovic of Serbia and third-ranked Slovak Daniela Hantuchova enjoyed contrasting opening-round victories in the Auckland Classic on Tuesday.
Top seed Justine Henin will face qualifier Timea Bacsinszky in the Antwerp tournament semi-finals.
Defending champion Serena Williams was knocked out of the Australian Open by Daniela Hantuchova
Daniela Hantuchova was knocked out of the Swisscom Challenge after a 7-6 7-5 defeat to Paola Suarez.
Top-seeded Daniela Hantuchova slumped out of the Bali Classic on Saturday, beaten 6-2, 5-7, 6-4 by Austrian teenager Tamira Paszek in the semi-finals. In the other match, Switzerland's Patty Schnyder defeated Russian Nadia Petrova 7-5, 6-1.
The Slovak won her first title in five years when she beat Svetlana Kuznetsova in the Pacific Life Open final.
A feisty Shinobu Asagoe reduced Daniela Hantuchova to tears of frustration as she overcame the ninth seed 0-6, 6-4, 12-10.
Fourth seed Maria Kirilenko overcame stiff second set resistance before prevailing over Ekaterina Ivanova to move into the pre-quarter-finals of the WTA Sunfeat Open.
The Russian will meet Mariya Korrytseva in Sunday's final at the Sunfeast Open in Kolkata.
Hungarian teenager Agnes Szavay beat injured Daniela Hantuchova 7-6, 6-1 on Friday to advance to the semi-finals of the Paris Open.
Daniela Hantuchova beat Venus Williams for the first time in 11 career meetings to advance to the semi-finals of the Eastbourne International grass court tournament on Thursday. The Slovak overcame difficult, windy conditions to triumph 6-2, 5-7, 6-2 and cut short Williams' comeback before she begins her bid for a sixth Wimbledon singles title next week.
The Slovak will meet Svetlana Kuznetsova in the final of the Eastbourne International.
Germany's Sabine Lisicki made up for lost time by crushing in-form Daniela Hantuchova in the delayed final of the Edgbaston championship on Monday.
Sixteen-year-old Croatian Donna Vekic was denied her first WTA title as she lost 7-6(5), 6-4 to Tour stalwart Daniela Hantuchova in the Aegon Classic final in Birmingham on Sunday.
Sixth seed Daniela Hantuchova of Slovakia, eighth seed Francesca Schiavone of Italy and India's Sania Mirza moved into the second round of the $1.3 million Qatar Open on Monday.
Lindsay Davenport was one of seven seeds to advance but four went out, including number three Daniela Hantuchova, fifth-seeded Patty Schnyder and Austrian Sybille Bammer, in the second round of the Amelia Island Championships.
The 22-year-old player has had a solid year, winning the mixed-doubles titles at the French and U.S Open.
Ninth seed Daniela Hantuchova avoided a second successive first-round exit when she came from behind to beat Aravane Rezai of France 4-6, 6-1, 6-2 in the first round of the Italian Open on Monday.
Ashley Harkleroad accounted for the scalp of Hantuchova while Kafelnikov lost to Flavio Saretta at the French Open.\n\n
Leander Paes and Radek Stepanek went through several anxious moments before getting the better of Daniele Bracciali and Jonathan Erlich in the first round of the men's doubles at Wimbledon on Friday, even as the pair of Mahesh Bhupathi and Daniela Hantuchova lost in the mixed doubles
Second seed Daniela Hantuchova suffered a setback before next week's U.S. Open when she was beaten by a Hungarian qualifier in the second round of the WTA event in New Haven on Wednesday.
Daniela Hantuchova maintained her good form at Pacific Life Open with a gritty 6-2 5-7 7-6 victory over Israeli 11th seed Shahar Peer in the quarter-finals on Wednesday.
World number one Caroline Wozniacki suffered another Grand Slam nightmare as she was comprehensively beaten 6-1, 6-3 by Slovakian Daniela Hantuchova in Paris, on Friday.
Leander Paes, Sania Mirza, and Mahesh Bhupathi have left their mark by collectively winning 10 US Open titles.
They beat Katarina Srebotnik of Slovakia and Nenad Zimonjic of Serbia 6-4, 6-2 in the final at the US Open.
The Indian ace surrendered tamely after winning the first set to the US Open doubles champion in the first round of the Medibank International Open.
Australian Open champion Maria Sharapova, holder Daniela Hantuchova and second seed Svetlana Kuznetsova reached the Pacific Life Open quarter-finals in contrasting styles on Tuesday. Fourth seed Sharapova, winner at Indian Wells in 2006, maintained her perfect start to the season but had to work hard to beat Ukrainian Alona Bondarenko 6-2 5-7 6-4.
The US Open champion claimed her fourth title of the year on Sunday by beating unseeded Hantuchova 6-1, 4-6, 6-3.
The lightly-framed Slovakian thinks she is too skinny and weak and may have to sacrifice her pin-up status to succeed at the highest level.
She upset third-seeded Kuznetsova 6-4, 6-2 on Saturday.
Patty Schnyder defeated third seed Marion Bartoli of France while Daniela Hantuchova edged past Czech Nicole Vaidisova.
Serena Williams clinched one of the most dramatic victories of her career on Monday, battling crippling cramp to beat Daniela Hantuchova 6-2 6-7 6-2 in the fourth round at Wimbledon.
The bold and beautiful of the sports world came out in their best attire at the ESPY (Excellence in Sports Performance Yearly Award) awards on Wednesday in Los Angeles, California.
The other semi-final in the WTA Sunfeast Open will be between Mariya Koryttseva of Ukraine and Anne Keothavong of Britain.