Jamie Murray polishes the hold off with a two-handed volley at the net.

Good hustle from Skupski, sticking a little extra on his serve to keep the Spaniards under wraps. He cruises to 40-0.

A snappy hold to love for the world number one. It remains on serve in this decider.

Lots of venom off the strings of Rafael Nadal, sizzling Spain to 30-0. Jamie Murray goes on the hunt for points but is swatted away by Feli Lopez.

Lopez yanks one into the net, Nadal has his arms up in the air - he's unhappy about something? Not sure what... Great Britain hold.

Image source, Getty Images

Jamie Murray cruises to 40-0 with some punchy serving. That gives the Brits a welcome breather after a mammoth last service game. But that is a sublime down-the-line winner from Rafael Nadal...

Jonathan Jurejko
BBC Sport at Caja Mágica

Andy Murray is fidgeting around uncomfortably on the British bench. Murray junior is not a great watcher, even more so when it is his older brother. He can hardly look!

Picking at his lip, scratching his head, arms folded, never leaving his seat.

In contrast to his nervous body language, Dan Evans and Kyle Edmund are constantly on their feet, shouting encouragement and beating the courtside partition with their hands.

And Spain hold. Can't take your eyes off this one for a moment...

Double fault from Feliciano Lopez. Just opening the door slightly for Great Britain... superb close-range rally, everyone inside the service boxes as the ball is slapped back and forth like a game of beach tennis, only for Jamie Murray to clip the tape. 40-15.

Miles Maclagan
Former British Davis Cup player on BBC Radio 5 Live Sports Extra

Very important hold, just to get that first service game under your belt. Good effort from Skupski, they just need to tighten up the volleys a little.

Image source, Getty Images

Too much skid on that Neal Skupski first serve. Advantage. Now to close out... got it! Rafael Nadal can't engineer his return on target and that's a massive hold for GB.

Saved! By a tugged Jamie Murray volley at the net, found its target and that's all that matters.

Break point Spain.

Nadal gets the Brits backtracking and then seizes on the short ball to hammer it beyond the reaches of Skupski and Murray.

Proving hard to close out for Neal Skupski, as we enter the seventh minute of this game.

He skids forward to meet a passing return only to jab it long. Back to deuce.

Dan Evans, Kyle Edmund and co are all on their feet applauding a Neal Skupski ace. You've got to love the team aspect of the Davis Cup.

Rafael Nadal shanks a return... and it falls perfectly over Jamie Murray and inside the baseline. Even when he mistimes it he's hitting winners. Deuce.

Nice, Jamie Murray meeting a short return at the net and hammers it into the ground and up out of the reach the Spaniards. Rafael Nadal just cranks into full speed off the next point though to take it to deuce.

A tape-tickler from Lopez, leaping up off the net and over Neal Skupski's primed racquet.

Rafael Nadal thunders his return into the net and that's 15-15.

Image source, Gett

The hosts take another hard-earned hold. Hope you're sitting comfortably...

Jonathan Jurejko
BBC Sport at Caja Mágica

Shout! Who needs Hawkeye when you've got Marijana Veljovic in the seat. Great overrule for that Murray winner down the line. Feli Lopez, stood next to the ball, was convinced it as out. He was wrong.

Fist-bump worthy serve from Rafael Nadal. His partner Lopez swats it away, but the Spaniard almost takes the next one in the chin, bending Matrix-style away to stick a frame on it. Deuce.