An Uzbekistan-born American and a Russian-born Australian had easy straight-set victories Sunday in Australian Open Series warmup tournaments.

At the Brisbane International, U.S. citizen Varvara Lepchenko, who was born in Tashkent, beat Anna Karolina Schmiedlova of Slovakia 6-2, 6-1 in the first round.

In Perth, Western Australia, 4,300 kilometers (2,600 miles) from Brisbane, Daria Gavrilova, who was born in Moscow, gave the Australian Green team a 1-0 lead in the mixed teams Hopman Cup with a 6-2, 6-2 win over Sabine Lisicki of Germany.

Nick Kyrgios played Alexander Zverev in men's singles later with a chance to give the Australian side a winning 2-0 lead ahead of mixed doubles.

Lleyton Hewitt, who will retire after the Australian Open, played a night match for the Australia Gold team against Czech Republic.