Defending champion Roger Federer crashed out of Australian Open 2019 in the fourth round after going down to Greek Stefanos Tsitsipas, who became the first Grand Slam quarter-finalist from Greece. AdvertisingThe Swiss ended his bid for a record seventh Australian Open on a day of upsets that also saw second seed Angelique Kerber crash out. Here are some of the best reactions after Tsitsipas knocked out Federer from the Australian Open:Thanks @StefTsitsipas @rogerfederer , that was sport entertainment at its best . — roger rasheed (@roger_rasheed) 20 January 2019This kid is a future number 1. #Tsitsipas #AO2019 — Mahesh Bhupathi (@Maheshbhupathi) 20 January 2019O M G — Maria Sakkari (@mariasakkari) 20 January 2019Amazing!

Source: Indian Express January 20, 2019 13:06 UTC