Reigning champion Alexei Popyrin got his title defence off to a flying start on a mixed day for Australia's men at the Canadian Open.
After an opening-round bye, the 18th-seeded Popyrin was made to work harder than expected but still beat Canadian Nicolas Arseneault, ranked No.636 in the world, 7-6 (9-7) 6-3 in their round-of-64 clash in Toronto on Tuesday (local time).
