Then on Sunday, Kvitova gave the Czechs an insurmountable 3-0 lead with a 63 75 defeat of Vinci, who was brought into the line-up to replace Errani and took a 23-4 Fed Cup record into the contest.
"I'm very happy for the Czech Republic and our team," Kvitova said. "It was a very tough match against Vinci. I was ready for her, but she showed very good tennis.
"I played almost in my hometown. It was beautiful to see my parents and everyone who came to support us. It's unbelievable for us and we're happy to be in the final again."
Kvitova had lost two straight big matches in her series with Vinci, in the 2013 Katowice final and during Italy's win over the Czechs in the 2013 Fed Cup semifinals. But this time, Kvitova fired 32 winners compared to 13 for Vinci and converted on four of eight break point chances compared to two of 11 for Vinci. That improved her to 19-3 indoors in Fed Cup play and 18-4 on hardcourts.
The Czechs, who beat Spain in February to open their 2014 Fed Cup campaign, will be at home again in the final against Germany from November 8-9. They have a 6-1 lead in that series and will be seeking their eighth Fed Cup title and third in the past four years.
There were also World Group playoffs held this weekend, with Russia beating Argentina, Canada topping the Slovak Republic, Poland edging Spain and France getting past the United States. Eugenie Bouchard came up big for Canada, and World No.3 Agnieszka Radwanska and Caroline Garcia recorded three wins each for Poland and France, respectively.