Vinci earned her second straight-set win over Kvitova in less than a week. She beat the former Wimbledon champion in the final last weekend in Poland. That gave Vinci a career-high ranking of No. 12.
After reverse singles Sunday, Italians Flavia Pennetta and Francesca Schiavone are scheduled to face Andrea Hlavackova and Lucie Hradecka in doubles.
However, if the best-of-five series goes down to the doubles, Italy captain Corrado Barazzutti can switch to Errani and Vinci, the top-ranked team on the WTA Tour.