Ana Ivanovic gave Serbia a 1-0 lead against Kazakhstan at the Hopman Cup on Sunday by beating Yaroslava Shvedova 7-6 (6), 6-1.
Both players struggled with their serve in the first set, which saw five consecutive breaks.
But Ivanovic gradually took control thanks to her stronger baseline play in the hot and humid conditions at Perth's Burswood Dome.
After trading breaks again to start the second set, Ivanovic reeled off the next five games to clinch the win at the warmup tournament for the Australian Open.
The men's singles and mixed doubles matches were scheduled for later on Sunday.