Emma Raducanu won the first match on Friday in Britain’s bid for the Billie Jean King Cup title.
Raducanu beat Germany’s Jule Niemeier 6-4 6-4 on her return from injury.
Raducanu said afterwards: “I think I played some really good tennis today. Playing Jule on an indoor hard court isn’t easy. It’s a game of holding serve and trying to get a break where you can.
“I haven’t obviously played a match in a long time so these are small sharpness things that come the more matches I play. I’m very happy with how I regrouped and how I managed to close out that last game.”
She added on the GB team: “The team, each and every one of us, we are all playing our role. We wouldn’t be here without every member.
“[I’m] very proud of myself and also very proud of every team member playing their role as best as possible and sacrificing certain things. Everyone, especially Anne [Keothavong] leading us into the finals and we are starting at 1-0 up.”
Britain’s Katie Boulter faces Laura Siegemund before the women’s doubles.