Katie Boulter battled to a gripping three-set win over Hungary's Dalma Galfi to edge Great Britain closer to topping their Fed Cup group.
The British number two won 6-4 6-7 (5-7) 7-6 (7-1) in two hours 22 minutes.
Johanna Konta faces Anna Bondar next knowing victory will clinch the tie in front of a home crowd in Bath.
If they win, Great Britain would face Group B winners Serbia on Saturday for a place in April's World Group II play-offs.
More to follow.