Radek Stepanek and Petra Kvitova of the Czech Republic beat Spain's Daniel Muñoz and Anabel Medina Garrigues 3-0 in Hopman Cup action Sunday in Perth, Australia.
The 23-year-old Kvitova, a former Wimbledon champion, rolled over Medina Garrigues 6-1, 6-0 in 57 minutes.
The Spanish tennis player, who teamed with Fernando Verdasco to win the 2013 Hyundai Hopman Cup, said she was dealing with knee problems.
"I've had discomfort for a while and the long plane trip did not go down well with me. I have not been able to play my best tennis because of the discomfort and I hope I'll be better for the next match," the 31-year-old Medina Garrigues said.
The 35-year-old Stepanek, who helped the Czech Republic win the Davis Cup just over a month ago, had an easy time with the 31-year-old Muñoz, the world No. 194 and a last-minute replacement for the injured Tommy Robredo.
Stepanek beat Muñoz 6-2, 6-2 in 78 minutes.
The Czech team took the mixed doubles match 6-3, 6-4 in the eight-team round robin competition.
Spain will play the United States on Monday.
In other Hopman Cup action on Sunday, Poland beat Italy 3-0 and Canada defeated Australia 2-1.
The Hopman Cup is one of the tune-up events for the Australian Open, the tennis season's first Grand Slam event, which begins on Jan. 13. EFE