Defending champion Rafael Nadal of Spain is to face Andy Murray of Britain in the quarter finals of the Australian Open on Tuesday. Meanwhile, Dinara Safina withdrew due to injury, while Justine Henin booked her place in the last eight.
There will be no showdown for the number one spot in the women's ranking in Doha after Dinara Safina of Russia withdrew from the WTA Championships on Wednesday with a back injury, leaving US rival Serena Williams on top.
Dinara Safina of Russia has bounced back to the top of the WTA ranking on the eve of the season-ending Doha tournament, where the top eight players on the women's circuit will face-off for the $4.55 million jackpot.
World number one Dinara Safina of Russia crashed out of Tokyo's Pan Pacific Open after losing to Taiwanese qualifier Chang Kai-chen (7-6 4-6 7-5) in her opening match.
Belgium's Kim Clijsters takes on home favourite US Venus Williams four years after their last encounter in an eagerly anticipated fourth-round showdown between the two former Flushing Meadows champions.
World number one Dinara Safina, still looking for her first Grand Slam win, was her own worst enemy as she struggled against Germany's Kristina Barrois, eventually qualifying for the US Open third round with a 6-7 (5/7), 6-2, 6-3 win.
World number one Dinara Safina (photo) narrowly escaped becoming only the fifth top seed in Grand Slam history to lose in the first round as she battled three hard sets to oust Australian Olivia Rogowska, an 18-year-old wildcard entrant ranked 167.
Fifth-seed Jelena Jankovic has defeated Russia's Dinara Safina to win her second title this season at the Cincinnati Open. The Serbian swept to victory in straight sets, despatching the world number one 6-4, 6-2.
World number one Dinara Safina stormed into her eighth final of the year with a 6-2 6-0 demolition of Italian Flavia Pennetta at the Cincinnati Open. She will play Serbian Jankovic, who beat fourth-seeded Russian Elena Dementieva 7-6 0-6 7-6.
Playing her first tournament in two years, Belgium's Kim Clijsters lost 6-2 7-5 to world number one Dinara Safina in the quarter-finals. Safina will meet Italian 14th seed Flavia Pennetta in the semi-finals.
