Russia's Svetlana Kuznetsova beat the Czech Republic's Lucie Safarova in straight sets to level the Fed Cup final at 1-1 on the first day in Moscow.
Wimbledon champion Petra Kvitova gave the Czechs a 1-0 lead by beating Maria Kirilenko, also in straight sets.
Two-time Grand Slam winner Kuznetsova won 6-2 6-3, while Kvitova won 6-2 6-2 in one hour 10 minutes.
"I used more energy than it may appear looking at the score," Kvitova said.
Kuznetsova, 26, broke her opponent's serve twice for a commanding 4-0 lead before taking the first set in 36 minutes.
The 2004 US Open and 2009 French Open champion broke with the first game of the second set and kept up the pressure to win in one hour 22 minutes.
The 21-year-old left-hander Kvitova, who is ranked second in the world after winning last week's season-ending WTA championships in Istanbul, broke twice to take the opening set in 32 minutes.
She underlined her superiority in the second set, producing two more breaks to take the set and the match.
"At the beginning I felt I could overcome her (Kvitova) power play from the baseline," Kirilenko said. "But halfway into the first set Petra added power to her serve, and it became harder for me to return."
The title will be decided on Sunday with two reverse singles and a doubles match at the Olympic Stadium.