Australian Open: Jannik Sinner wins all-Italian match, fellow champion Madison Keys loses
Amanda Anisimova swept past China’s unseeded Wang Xinyu and will face fellow American Jessica Pegula in quarter-finals

Jannik Sinner sent an Australian Open statement in rolling into the quarter-finals on Monday but fellow champion Madison Keys was dethroned.
Amanda Anisimova swept past China’s unseeded Wang Xinyu and will face fellow American Jessica Pegula.
Fifth seed Lorenzo Musetti battled stifling conditions to set up a last-eight showdown with Novak Djokovic, and six-time major champion Iga Swiatek progressed in rampant fashion.
Melbourne Park king Djokovic was supposed to face the 20-year-old Jakub Mensik in the night match.
But the Czech player pulled out injured on Sunday, sending 10-time champion Djokovic into the last eight without hitting a ball.
The 38-year-old Serb will play Musetti after the Italian defeated American ninth seed Taylor Fritz 6-2, 7-5, 6-4.