Hingis breezed through her fourth round duel of former Roland Garros junior champions with Israel's Anna Smashnova in 63 minutes, 6-1, 6-2. Hingis won the junior title aged 12 in 1993, the 72nd-ranked Smashnova picked up that crown two years earlier when she was 14.

Powerful American Venus Williams set up a mouth-watering quarter-final clash with Hingis today when she beat Henrieta Nagyova of Slovakia in straight sets 6-1, 6-3 in 65 minutes.

Meanwhile, the unseeded Muster squandered two set points in the second set tie-break before outlasting world number 58 Farnando Meigeni, 6-4, 6-7 (8-10), 6-3, 3-6, 6-3 in a Centre Court baseline battle which lasted over three hours.

Number 15 seed Felix Mantilla, by comparison, needed only one hour 45 minutes in his demolition of world number one Pete Sampras'conqueror Ramon Delgado, 6-2, 6-2, 6-4 and another quarter-final berth.

Carlos Moya of Spain became the second Spaniard to reach the men's singles quarter-finals at the French Open today when he beat German qualifier Jens Knippschild in four sets.

The 12th-seeded Moya won 6-3, 7-5, 3-6, 6-4 in two hours 12 minutes and now plays either third-seeded Chilean Marcelo Rios or fellow Spaniard Albert Costa.

But the prize for longest game so far in the tournament went to the final third round game between 14 seed Alex Corretja and Hernan Gumy.

The two battled for a total five hours 30 minutes before Corretja prevailed, 6-1, 5-7, 6-7 (4-7), 7-5, 9-7, in a match stopped at 5-4 in the fourth set the previous night because of rain.

Gumy, who already needed four and a half hours in his previous game, managed staggering comebacks to from 5-0 and 5-1 down to 5-5 in the fourth and fifth set respectively before running out of luck. The Sunday stage alone lasted one hour 41 minutes before Correja wrapped up mattersin the 402nd point of the thriller.

CHANG CHUCKED OUT: Michael Chang became the fifth former champion to bow out on Saturday, losing in four sets to Spaniard Francisco Clavet 3-6, 7-6, 6-2, 6-4.

How The Seeds Fared

15-Felix Mantilla (Spain) bt Ramon Delgado (Paraguay) 6-2, 6-2, 6-4; 14-Alex Corretja (Spain) bt Hernan Gumy (Argentina) 6-1, 5-7, 6-7 (4-7), 7-5, 9-7.
Women's Singles: 8-Venus Williams (US) bt Henriea Nagyova (Slovakia) 6-1, 6-3; 1-Martina Hingis (Switzerland) bt Anna Smashnova (Israel) 6-1, 6-2; 2-Lindsay Davenport (US) bt Sandrine Testud (France) 6-3, 4-6, 6-2; 4-Arantxa Sanchez-Vicario (Spain) bt Serena Williams (US) 4-6, 7-5, 6-3; 6-Monica Seles (US) bt Chanda Rubin (US) 6-1, 6-4.
Other Results

Men's fourth round: Thomas Muster (Austria) bt Fernando Meligeni (Brazil) 6-4, 6-7 (8-10), 6-3, 3-6, 6-3.
Women's Singles: Patty Schnyder (Switzerland) bt Magui Serna (Spain) 6-1, 6-3.