MELBOURNE, 12 February, 2021 (TON): Aslan Karatsev stunned Diego Schwartzman to reach the Australian Open fourth round but Alexander Zverev made light work of Adrian Mannarino on day five.
Karatsev made his first Grand Slam main draw appearance and beat the Argentine 6-3 6-3 6-3.
He has not dropped a set since the first round of qualifying.
Karatsev will play one of Canadian duo Denis Shapovalov or Felix Auger-Aliassime next.
World number 114 Karatsev has mostly played on Challenger events, the level below the ATP Tour and has previously lost in qualifying for every major.
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