Chris Bradnam
BBC Sport commentator at Wimbledon

Matches like this inspire. There is an urgency from Sinner, and he is on his way.

Andrey Rublev is handling Alexander Bublik's serve well in this game and has the chance to go 40-15 up and break point, but he sends a forehand long allowing Bublik to turn things round and secure the hold.

Galan saves the first set point with a brilliant return on second serve.

He gets the next first serve back too but then goes long with a forehand and the set goes to Jannik Sinner.

Michael Emons
BBC Sport at Wimbledon

Image source, Reuters

Both players stand motionless, stunned at what happened as Alexander Bublik produces a beautiful passing shot to get his first set on the board and into the fourth set we go.

Bublik had been 6-3 ahead in the tie-break, saw Rublev pull it back to 6-6 with the Russian two points away from a first ever Wimbledon quarter-final, but the 23rd seed wins the set as the crowd cheer as they get to watch another set of this one.

In weather-related news, and it is good news, the sun is out with Centre Court covered with sunshine. It had looked a bit dicey at the end of the second set but the rain has decided to stay away so far.

Nasty slip for Daniel Elahi Galan as Jannik Sinner puts away a big forehand to claim the mini-break.

Oh and it's a double break as Galan finds net. Three set points for the Italian. On his serve, the first two.

A swift and straightforward hold to love for Andrey Rublev, sealing it with an ace.

Strong start to this fourth set.

Still no break in the breaker.

No wonder with these absolute rockets being pounded down on serve.

Image source, Reuters

How has he managed that?!

Andrey Rublev dashes into the net after a serve and hits a forehand cross-court.

Bublik moves to his right and sees the opportunity to pass the seventh seed.

The Kazakh whips a high forehand past Rublev and it lands smack bang on the baseline, gifting him the third set of this fourth-round match.

Chris Bradnam
BBC Sport commentator at Wimbledon

Sinner can argue as much as he likes with the umpire, but she is not going to change her mind.

Jannik Sinner is aggrieved.

The umpire calls a forehand long. The Italian challenges and it has clipped the line.

But the point will be replayed, not awarded to Sinner. He engages in a lengthy discussion with the umpire about the issue - and then slams down an ace to make it all irrelevant anyway.

Alexander Bublik earns himself three set points and Andrey Rublev saves two of them on his serve.

The last falls on Bublik's racquet and a great serve landing in the corner of the service box is somehow returned by Rublev.

Bublik can't believe it, muttering something inaudible and we're level again.

So, then, a comfortable hold from Jannik Sinner takes us to a tie-break in the fourth round on Court One.

Every game in this set has gone with serve - and so have the first three points of the breaker.

Andrey Rublev goes long with a forehand down the line!

The pressure is building in this third set tiebreak and Alexander Bublik aces the next point to back up the mini-break.

First blow for Alexander Bublik. He goes ahead in the tie-break but a failed drop shot from the Kazakh on the next point brings Andrey Rublev straight back into it.

Credit, Daniel Elahi Galan. A couple of good serves put Jannik Sinner on the back foot to help save those break points.

And he goes on to hold thanks to a big ace. That was excellent from the Colombian.

BBC iPlayer

Away from the show courts, there's one other men's singles match ongoing.

Denis Shapovalov, who beat Britain's Liam Broady in round three, is level at one set all against Roman Safiullin on court two.

You can watch that one, and indeed action from all courts, on the BBC iPlayer.

Image source, Reuters

Andrey Rublev loses the first point of his service game, causing some quiet murmurs around Centre Court.

The seventh seed doesn't let that get to him though and wins the next four points, taking this third set into a tie-break.

This is the kind of time in the set that the lower-ranked player might get a bit nervy.

And, yep, a couple of errors creep in on the Galan serve to hand Jannik Sinner two break points.

There have been few exciting rallies in this match so far. Most games go without fanfare and tend to be easy holds for the server.

It's the same again for Alexander Bublik who earns himself at least a tiebreak in this third set of this fourth round match on Centre Court.

Andrey Rublev has played a solid match so far. The seventh seed is not letting Alexander Bublik into this match and the Kazakh isn't creating any problems on Rublev's service games.

Tie-break anyone?