Australia's Alexei Popyrin has been knocked out of the Rotterdam ATP tournament at the first round stage by Karen Khachanov in a tight three-set match.
The Australian world No.66 was beaten 7-6 (4), 1-6, 6-7 (8) in just over three-and a-half-hours. He had chances to defeat Khachanov, who is ranked 38 places higher, but could not take them.
