Postpublished at 09:23 Greenwich Mean Time 22 January
Zverev 7-5 3-6 6-3 4-6 6-6 Norrie
A sliced drop shot effort from Norrie, but he sends it wide. 4-2 Zverev, who leads by two for the first time in this 10-point tie-breaker.
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Cameron Norrie beaten by Alexander Zverev 7-5 3-6 6-3 4-6 7-6 (10-3)
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Michael Emons, Adam Chowdhury and Ros Satar
Zverev 7-5 3-6 6-3 4-6 6-6 Norrie
A sliced drop shot effort from Norrie, but he sends it wide. 4-2 Zverev, who leads by two for the first time in this 10-point tie-breaker.
Zverev 7-5 3-6 6-3 4-6 6-6 Norrie
No joy for Norrie with this drop shot effort, 3-2 Zverev.
Zverev 7-5 3-6 6-3 4-6 6-6 (2-2) Norrie*
Gigi Salmon
BBC Sport tennis commentator on BBC Radio 5 Sports Extra and BBC Sounds
I have never seen so many drop shots from Norrie – and they are working.
Zverev 7-5 3-6 6-3 4-6 6-6 Norrie
Norrie serves out wide, dashes to the net and sends away a winner, 2-2.
Zverev 7-5 3-6 6-3 4-6 6-6 Norrie
Ace Zverev, straight down the middle, 2-1 Zverev.
Zverev 7-5 3-6 6-3 4-6 6-6 Norrie
Norrie with a drop shot from the gods after a lengthy rally, 1-1 in the 10-point tie-breaker.
Zverev 7-5 3-6 6-3 4-6 6-6 Norrie
Zverev gets off to a good start, 1-0.
Zverev 7-5 3-6 6-3 4-6 6-6 Norrie
Zverev holds and it is a match tie-breaker to decide the outcome. It's a 10-point tie-break for a spot in the quarter-finals.
*Zverev 7-5 3-6 6-3 4-6 5-6 Norrie
Zverev takes the opening three points of the 12th game of set five.
*Zverev 7-5 3-6 6-3 4-6 5-6 Norrie
David Law
Commentator on BBC Radio 5 Sports Extra
I just don't think I have ever seen Norrie play better than in this match,
It's right there for him.
*Zverev 7-5 3-6 6-3 4-6 5-6 Norrie
Cameron Norrie was 0-30 down and in some trouble, but he keeps his calm, including a lovely delicate drop shot and he nudges back ahead.
Alexander Zverev just had to serve to stay in the tournament. He has to do the same again now.
Zverev 7-5 3-6 6-3 4-6 5-5 Norrie*
An excellent drop shot from Norrie, not what Zverev needs after nearly four hours of action and that brings up game point for Norrie, 40-30.
Zverev 7-5 3-6 6-3 4-6 5-5 Norrie*
An attacking backhand down the line from Norrie and from 0-30, it's 30-30 on his serve.
Zverev 7-5 3-6 6-3 4-6 5-5 Norrie*
Norrie 0-30 down after an unforced error. That's 20 unforced errors for him in this final set.
Zverev 7-5 3-6 6-3 4-6 5-5 Norrie*
Gigi Salmon
BBC Sport tennis commentator on BBC Radio 5 Sports Extra and BBC Sounds
Very tense out there right now.
Zverev 7-5 3-6 6-3 4-6 5-5 Norrie*
Zverev holds despite that opening double fault. Cameron Norrie was three points away from the quarter-finals.
Now he must hold his serve. What a match. Five-all in the decider.
*Zverev 7-5 3-6 6-3 4-6 4-5 Norrie
Norrie opens up the shoulders on the forehand from the baseline but overcooks it and Zverev, in a game he must win, is 30-15 on his serve.
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Kirsty: C’MON CAM!! Rooting for the swashbuckling leftie.
*Zverev 7-5 3-6 6-3 4-6 4-5 Norrie
A double fault from Zverev, his sixth of the day. Norrie three points away, 0-15.
*Zverev 7-5 3-6 6-3 4-6 4-5 Norrie
Cameron Norrie keeps his cool and holds his serve to 15. He is four points away from reaching the quarter-finals of the Australian Open for the first time in his career.
Sixth seed Alexander Zverev was a set and a break up, now he's serving to stay in the tournament.