Italy won both singles matches against Britain in straight sets on Sunday to reach the Davis Cup semifinals for the first time in 16 years.
Fabio Fognini pulled off a surprise 6-3, 6-3, 6-4 victory over two-time Grand Slam champion Andy Murray to level the best-of-five quarterfinal at 2-2 before Andreas Seppi defeated James Ward 6-4, 6-3, 6-4 in the decisive match.
"A great feat, a great success for all Italian tennis," Italy captain Corrado Barazzutti said. "It was time we got back to the semifinals. It's credit to everyone, to a team which has a great character. It was a victory of character."
Britain was looking to reach the semifinals for the first time since 1981 but Fognini was in commanding form to end Murray's run of 19 consecutive singles victories in the competition.
Seppi rarely struggled against a player ranked 127 places below him and comfortably served out for the match.