It was a surreal day in Glasgow as Great Britain won all three matches in straight sets to defeat Spain and reach the semi-finals of the Billie Jean King Cup for the first time since 1981. David and Matt discuss how it happened, from Heather Watson's superb performance to get things going, to Harriet Dart upsetting Paula Badosa, to the relatively unknown duo of Alicia Barnett and Olivia Nicholls combining to win the decisive point. Elsewhere, there's chat about Australia booking their last four spot by beating Belgium, Canada and Czech Republic getting their campaigns going, and lots of excitement for tomorrow's ties.

Want to go watch the Bille Jean King Cup Finals this week in Glasgow? Tickets are available now.

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BJK Cup Finals Day 3 - Great Britain stun Spain to reach semis; Showdowns set for Friday