Third chance for Norrie in this game as RBA nets... but the Briton nets himself. Deuce again. This game could be crucial. A dash to to the net as he reads a drop shot and Norrie has his fourth BP of the game.

Ooh, long from Norrie - back to deuce. He was in that rally.

Norrie into the net but he's got another chance...

Double fault from Bautista Agut and Cameron Norrie has a chance to go a double break up at 30-40.

Alistair Bruce-Ball
BBC Radio 5 live in Marbella

The British fans are shouting themselves hoarse out there but it’s working because their boy Norrie has turned this second singles rubber into a real battle. Remarkable really considering this is his first professional match on the red clay.

Norrie made the point yesterday that the pressure would all be on Bautista Agut because he was such a big favourite so it’s going to be interesting to see how the Spaniard now copes with it all as the match gets tight.

Great Britain’s captain Leon Smith must be absolutely delighted the way his two debutants have risen to the occasion today in terms of their performance.

Image source, BBC Sport

It's Cameron Norrie who's dictating play - the match feels like it's on his racquet at the moment. A forehand leaks wide from RBA and Norrie moves 4-2 ahead in the fourth. Can he force a fifth? Whatever happens from here, what an effort.

A medical timeout for Bautista Agut between games as the Spanish team really work his thighs. The world number 23 seems to be struggling physically and mentally. Can Norrie back up the break and increase the pressure further?

Jamie Baker
Former GB Davis Cup player on BBC Red Button

Incredible turnaround form the first couple of first sets. The word I can't get out of my head at the moment is belief. The turning point was that 1-0 game in the third set where Bautista Agut threw in a loose one. I don't want to talk about winning the match but Norrie certainly believes he can take this to a fifth set.

That's the break!

A netted forehand from Roberto Bautista Agut, and it's Cam Norrie who hustles his way in front in this fourth set.

A forehand volley from Norrie, and break point #2 comes rattling along...

Down the line goes the Spaniard, and Norrie backhands his return into the stands.

Deuce.

Cagey from both players, but it's Norrie who gets his nose in front first at 15-30.

Norrie does well to unfurl a smash but Bautista Agut is waiting with the volley. Then Norrie dances forward and just cracks a lovely forehand down the line for break point...

Jamie Baker
Former GB Davis Cup player on BBC Red Button

He's clearly not played much five-set tennis, he's not played much clay-court but, physically, deep into the fourth set it looks like he's coping with the intensity pretty well.

Norrie chucks a bit of extra zip into his second serve and it beats Bautista Agut, who ends up charging around as Norrie cooly thwacks a winner.

That's a hold from the Briton! Excellent work.

Ace from the Brit!

As you were.

A deep pick up from Norrie means he has to force his way back into the rally and he can't quite sort it out as his forehand lands long.

Break point #3 for Spain...

Backhand from Norrie, and a grumpy-looking Bautista Agut thrashes his return long.

Oh, that's nice from Bautista Agut though, sprinting forward to go through his own array of net tricks. Back to deuce!

Just the nine minutes for this game so far...

A fine forehand from Cam Norrie gets him out of trouble once again!

Bautista Agut chased that and ended up sliding along the back of the court. Deuce!

A whipped forehand from Norrie drifts over the tramlines and out. Break point number two for Bautista Agut...

Advantage Norrie, but it's snuffed out as Bautista Agut charges to meet his drop shot wtih a volley of his own.

Back to deuce.