Stefanos through to fourth round

Two-time finalist Daniil Medvedev suffered a shock third-round defeat by American Sebastian Korda at the Australian Open as top players continue to fall in the men's draw.

Former US Open champion and seventh seed Medvedev lost 7-6 (9-7) 6-3 7-6 (7-4) to 22-year-old Korda.

Top two seeds Rafael Nadal and Casper Ruud are already out, although third seed Stefanos Tsitsipas won on Friday.

Fourth seed Novak Djokovic will play his third-round match on Saturday.

Russia's Medvedev had reached the final at the Australian Open for the past two years but could not match Korda's level on Rod Laver Arena. BBC