Iga Swiatek suffers shock defeat to Linda Noskova, Daniil Medvedev advances

World number one Iga Swiatek's 18-match winning run came to a shuddering halt at the Australian Open on Saturday when she was dumped out in the third round by unseeded Czech teen Linda Noskova. The Polish top seed appeared en route to the last 16 afer taking the first set but lost her way, going down 3-6, 6-3, 6-4 in two hours and 20 minutes to the world number 50.

Just three of the top 10 women's seeds remain in the draw in Melbourne at the end of the first week. "I'm speechless," said Noskova, who is at her first Australian Open. "I knew it was going to be an amazing match, but I didn't really think it would end up like this. "I'm just really glad to get through."

Swiatek, 22, who produced a stunning second-round comeback to beat former finalist Danielle Collins, broke in the sixth game and went on to take the first set in 43 minutes.