<p>Serena Williams stormed into the quarter-finals of the Australian Open on Sunday with a gritty 6-4 2-6 6-4 victory over Belarusian Aryna Sabalenka.</p>.<p>The match was a big test for Williams, who was up against one of the few players on the women's tour capable of matching her power from behind the baseline.</p>.<p>"I'm happy to get through that one," Williams said in an on-court interview. "It wasn't easy and I knew it wasn't going to be easy. She was teeing off on every shot.</p>.<p>"Even the games that I lost were super close, one shot here and one shot there, and I just felt like, 'Serena you've got this, you've just got to keep going.'"</p>.<p>The players went toe-to-toe in an even first set until Williams pounced late to break Sabalenka for the first time and take a 1-0 lead.</p>.<p>The roles were reversed at the start of the second, however, with Sabalenka breaking Williams in her first two service games.</p>.<p>The American, who is chasing a record-equalling 24th Grand Slam title, clawed a break back but was powerless in the face of Sabalenka's onslaught as the seventh seed broke once more for a 4-1 lead before sending the match into a decider.</p>.<p>"I lost the second set but the games were so close so I just tried to stay in there," Williams added.</p>.<p>With the pressure ramped up in the third, it was Sabalenka who blinked first, making several errors on serve to hand Williams a 3-1 lead.</p>.<p>The Belarusian broke back and then levelled the set at 4-4 with a hold to love but the pressure finally told with Sabalenka serving to stay in the match trailing 5-4.</p>.<p>Sabalenka double-faulted to give Williams a 15-30 lead and netted a forehand to hand her two match points, conceding the match by sending a forehand long.</p>
<p>Serena Williams stormed into the quarter-finals of the Australian Open on Sunday with a gritty 6-4 2-6 6-4 victory over Belarusian Aryna Sabalenka.</p>.<p>The match was a big test for Williams, who was up against one of the few players on the women's tour capable of matching her power from behind the baseline.</p>.<p>"I'm happy to get through that one," Williams said in an on-court interview. "It wasn't easy and I knew it wasn't going to be easy. She was teeing off on every shot.</p>.<p>"Even the games that I lost were super close, one shot here and one shot there, and I just felt like, 'Serena you've got this, you've just got to keep going.'"</p>.<p>The players went toe-to-toe in an even first set until Williams pounced late to break Sabalenka for the first time and take a 1-0 lead.</p>.<p>The roles were reversed at the start of the second, however, with Sabalenka breaking Williams in her first two service games.</p>.<p>The American, who is chasing a record-equalling 24th Grand Slam title, clawed a break back but was powerless in the face of Sabalenka's onslaught as the seventh seed broke once more for a 4-1 lead before sending the match into a decider.</p>.<p>"I lost the second set but the games were so close so I just tried to stay in there," Williams added.</p>.<p>With the pressure ramped up in the third, it was Sabalenka who blinked first, making several errors on serve to hand Williams a 3-1 lead.</p>.<p>The Belarusian broke back and then levelled the set at 4-4 with a hold to love but the pressure finally told with Sabalenka serving to stay in the match trailing 5-4.</p>.<p>Sabalenka double-faulted to give Williams a 15-30 lead and netted a forehand to hand her two match points, conceding the match by sending a forehand long.</p>