First it was Jordan Thompson, now it's the turn of Alexei Popyrin in Tokyo.
One day after Thompson eliminated world No.2 Alexander Zverev to throw the Japan Open wide open, Popyrin proved to be another giantkiller when he sent the seventh-ranked Karen Khachanov packing.
Popyrin defeated the Russian 6-4 6-2 on Tuesday to reach the last 16 of the ATP tournament.
