That's exactly why Grigor Dimitrov was complaining about the decision to close the roof between sets. The Bulgarian's momentum has been completely rocked by the lengthy stoppage on court.

Jakub Mensik takes full advantage of the situation though, immediately opening up two break points and forcing Dimitrov to make the unforced error at 30-40.

Perfect for Mensik. Irritating for Dimitrov.

All-British duo Katie Boulter and Heather Watson have been knocked out in the first round of the women's doubles, in three sets.

The pair took a second-set tie-break to level and then broke early in the decider, but spurned three break points to go 3-0 up and went on to be broken twice by Katarzyna Piter and Anna Siskova.

It's not been a good day for the Brits in the women's doubles, with four other British pairs and 12th seed Olivia Nicholls (partnering Slovakia's Tereza Mihalikova) all falling at the first hurdle.

Image source, Getty Images

Dom Inglot
Former British tennis player on BBC TV

Tiafoe will be happy that he came through that match effectively.

There's definitely things he needs to look out for though. I think he'll admit that the first set was not his best. It was almost the kick in the backside he needed.

Grigor Dimitrov takes the third set! The 35-year-old isn't in the mood for taking any extra time on court these days, and who can blame him?

Highlights included a flick of the wrist to beat Mensik at the net with a blistering forehand for 0-15 and a one-handed backhand that caught Mensik off-guard for 15-40.

He is really working his opponent around the court, it is like a game of cat and mouse at times.

There's a bit of commotion between sets though because the roof is being closed on court one, much to Dimitrov's dislike. He asks the umpire: 'We knew we weren't going to finish the match, so why didn't we start closing the roof during the set?'

Three big serves, none returned into play.

Frances Tiafoe with three match points.

Frances Tiafoe has three break points at his disposal, he only needs one.

Jan Choinski hands him the break with a forehand unforced error but Tiafoe's return dominance has set up this emphatic race through the fourth set.

Everything is going Frances Tiafoe's way. With almost no back swing, he pings a backhand return off a good serve and the ball nestles in the corner of the court, leaving Jan Choinski flat-footed.

Three break points for the American.

Another brisk hold for Frances Tiafoe. He's not expending any unnecessary energy in his service games.

Jan Choinski keeps himself in touching distance of Frances Tiafoe. Excellent fight to get through that service game.

Mark Woodforde
17-time Grand Slam doubles champion on BBC Radio 5 Sports Extra 2

Frances Tiafoe is just starting to impose himself here. Unfortunately for Jan Choinski, the small opportunity he had late in set three obviously didn't go his way and that had a real heavy impact on him.

It isn't out of the question that he could come back into this, but he's got to start building momentum because Tiafoe is starting to puff that chest out.

Saved again with a sweet forehand winner.

That's a fizzing strike from Frances Tiafoe, angled cross-court to drag Jan Choinski deep into the tramlines. His tumbling forehand doesn't find the court.

Saved with an ace down the T! Blistering serve.

Jan Choinski wastes a routine forehand.

Much of the crowd are rising and falling with Jan Choinski's every stroke. Elation as he comes on the approach for a forehand winner, deflation one point later when he comes over a forehand and wallops it into the net.

The Brit gets up 40-15 with a flat backhand but with a couple of well-struck returns, Frances Tiafoe turns up the pressure.

Emily Salley
BBC Sport at Wimbledon

A man starts a "let's go Jan, let's go" chant, but it's immediately drowned out by "let's go Foe, let's go".

It gets a bit rowdy and the chair umpire has to tell everyone to calm it down. "Silence please".

Dom Inglot
Former British tennis player on BBC TV

Winning slams is something that Choinski hasn't experienced a lot. The way he hits the ball is draining, he works so hard. Every shot he hits seems like a monumental effort.

Tiafoe is able to generate a lot of force in other ways, flicking the wrist to generate power. He does it in a way that is less taxing.

Frances Tiafoe has hit a relentless streak. Back-to-back holds to love.

Emily Salley
BBC Sport at Wimbledon

The crowd are trying to rally behind Jan Choinski, but even they seem to lack belief. It's all a bit flat.

Frances Tiafoe's fans, meanwhile, are whooping and whistling every time he lands a winner.