Noskova stuns top seed Swiatek in Australian Open third round

Top seed Iga Swiatek tumbled out of the Australian Open after losing 3-6 6-3 6-4 to Czech teenager Linda Noskova in the third round as her bid for a maiden title at Melbourne Park and fifth Grand Slam trophy fell apart.

The Pole, more accustomed to breezing past opponents with the odd "bagel" or 6-0 scoreline thrown in, had struggled in Melbourne, enduring a first-set tiebreak in her opener against Sofia Kenin before fighting back from the brink of defeat to oust Danielle Collins last time out.

But it was not to be, as Noskova became the first teenager to defeat the top-ranked player at the Australian Open since Amelie Mauresmo toppled Lindsay Davenport in 1999.

"I'm speechless. I knew it was going to be an amazing match with the world number one and such a player, but I didn't really think it would end up like this," said Noskova.

The emotional 19-year-old crouched to the floor and put her hands over her face when the big moment came and buried her head in her towel later and cried.

"I'm just really glad to get through this round," she added.

Noskova had emerged as a tricky third-round opponent for Swiatek with three top-10 wins under her belt, but the Pole had looked in no mood to be dragged into another fight as she broke in the sixth game and held to love in the next to take charge.

The 22-year-old Swiatek barely let the intensity drop after taking the opening set as she forced the Melbourne Park debutant into some uncomfortable positions in the second by working the angles and launching big forehands.

But Noskova held firm, responding with some explosive hitting of her own and breaking en route to levelling up the contest before heaping the pressure on the four-times major champion to take a 2-1 lead in the decider.

Swiatek looked to have composed herself during a brief pause in play as doctors attended to a sick supporter in the crowd and broke back, but Noskova did not relent and got her nose in front again to close out the match on serve and complete a huge upset.

"I was shaking a little," Noskova said about serving for the victory. "I didn't hit two first serves, which was not the best start for me, but I pulled out an ace."