Melbourne, - Former world number four Jelena Dokic on Wednesday kept her dream of an Australian Open wild card place alive, reaching the quarter-finals with a straight-set victory,

Dokic, 25, and fighting through a comeback in the sport, beat Victorian teenager Marijia Mirkovic 6-4, 6-2, riding a 4-0 lead in the second set to the win.

"I was happier with my match today, I played a bad match yesterday," said Dokic, who lost on Tuesday but stayed alive thanks to the round-robin format of the competition.

High-profile teenager Bernard Tomic, reigning Australian Open junior champion, lost his second match of the week to exit the playoffs. But a stroke of misfortune to the man who beat him might still keep Queensland's Tomic in the hunt.

An injury to Colin Ebelthite may yet provide the late reprieve for Tomic, who lost to veteran Joe Sirianni 6-3, 6-1.

After Ebelthite hurt a rib in his match, he might have to be replaced in the draw by none other than Tomic, who could then face Davis Cup player Peter Luczak.

Players have a day off Thursday before the Friday quarter-finals at Melbourne Park. (dpa)