Great Britain's hopes of reaching the Billie Jean King Cup final for the first time since 1981 rest on the outcome of a deciding doubles after Katie Boulter lost her singles match against Slovakia.
British number two Emma Raducanu put her team in command with a 6-4 6-4 victory over Viktoria Hruncakova in Tuesday's semi-final
Boulter looked to secure their place in Wednesday's final by beating Slovakian number one Rebecca Sramkova afterwards.
But Britain's leading singles player lost 2-6 6-4 6-4 as the best-of-three tie went the full distance.
Heather Watson and Olivia Nicholls have been called upon for the first time this week, taking on Slovakian pair Hruncakova and Tereza Mihalikova.
Italy, who are led by world number four Jasmine Paolini, await the winners.
Britain have never won the women's team event, which was formerly known as the Fed Cup and now branded as the World Cup of Tennis.
Anne Keothavong's team, which also features Harriet Dart, are aiming to be the fifth British side to contest the final in its 61-year history.