Martina Hingis breezed into the last 16 at the Australian Open on a fearsomely hot day six at Melbourne Park where the top women's seeds all enjoyed easy victories.
Former champion Hingis' return continues to gather momentum as she beat Czech Iveta Benesova 6-4 6-1, the Swiss star now having dropped only 10 games so far in the tournament.
Third seed Amelie Mauresmo was only on court for 30 minutes after Dutch teenager Michaella Krajicek withdrew as temperatures soared.
Mauresmo raced to a 4-0 lead and took the first set 6-2 before Krajicek called for the trainer and soon conceded defeat.
Twelfth seed Anastasia Myskina overcame Sweden's Sofia Arvidsson in a scrappy affair, the pair committing more than 60 unforced errors between them in only one hour of tennis.
Myskina claimed the first set before racing to a 5-0 lead in the second, eventually closing out the match 6-3 6-1.
Italian Francesca Schiavone had the easiest victory of the day, the 15th seed crushing Spain's Maria Sanchez Lorenzo 6-0 6-0 in only 42 minutes.
Former Australian Open semi-finalist Patty Schnyder and Aiko Nakamura both struggled to hold serve in their match with 10 breaks in just 17 games.
Nakamura won less than a quarter of points on her second serve, helping the Swiss seventh seed progress to the fourth round 6-2 6-3.
Sixteen-year-old Nicole Vaidisova and Italian 20th seed Flavia Pennetta also found serving difficult, but the Czech 16th seed showed why she is being touted as a player of the future with a 6-4 6-2 win.
Womens Singles 3rd round results for 21 January: 7 Patty Schnyder (Swi) bt Aiko Nakamura (Jpn) 6-2 6-3 12 Anastasia Myskina (Rus) bt Sofia Arvidsson (Swe) 6-3 6-1 16 Nicole Vaidisova (Cze) bt 20 Flavia Pennetta (Ita) 6-4 6-2 3 Amelie Mauresmo (Fra) bt Michaella Krajicek (Ned) 6-2 ret Martina Hingis (Swi) bt Iveta Benesova (Cze) 6-4 6-1 Samantha Stosur (Aus) bt Sybille Bammer (Aut) 7-5 4-6 6-3 15 F Schiavone (Ita) bt M Antonia Sanchez-Lorenzo (Spa) 6-0 6-0 2 Kim Clijsters (Bel) bt Roberta Vinci (Ita) 6-1 6-2
