Alexander Zverev and Tomas Berdych will be on Centre Court shortly.

Zverev is signing autographs and taking photos, even though he can't quite muster a smile.

Zverev 3-6 4-6 6-4 1-6 Berdych: Game, set, match to Tomas Berdych, and that fourth set was a bit of an anti-climax after Zverev's efforts to get it that far.

Zverev 3-6 4-6 6-4 1-5 Berdych: Fifth game in a row for Tomas Berdych and we are hurtling headlong to an inevitable conclusion as Zverev fades.

Zverev 3-6 4-6 6-4 1-4 Berdych: Zverev is tiring now as he tries to focus, but he can't hold on to his serve against the guile of Berdych, who knows exactly how to cope on the biggest stages.

Zverev 3-6 4-6 6-4 1-3 Berdych: Crushing serve from Tomas Berdych now and Zverev is running out of time to make in-roads. A couple of scattered shouts of encouragement for the younger man from the crowds as he tries to psych himself up.

Zverev 3-6 4-6 6-4 1-2 Berdych: That's the Berdych break! It's tense and tight as these points run longer and longer.

Zverev 3-6 4-6 6-4 1-1 Berdych: These games are getting longer and longer as these players probe and look for their opportunity to break.

Zverev 3-6 4-6 6-4 1-0 Berdych: Now then, the crowd are clearly up for a decider after two straightforward women's games on Centre Court, and Alexander Zverev is certainly promising them some kind of drama at this point. He holds to open the fourth.

Zverev 3-6 4-6 6-4 Berdych: A big cheer from Centre Court and a contained celebration from Zverev, and this is interesting. Berdych clocked up 18 unforced errors in this third set, even though he also managed 15 winners.

Zverev 3-6 4-6 5-4 Berdych: Zverev has his head up and he's firing. One more hold and he takes to his seat to guzzle a bright pink energy drink, and the crowd are right behind him to push this match into a fourth...at the minimum.

Zverev 3-6 4-6 4-4 Berdych: And the Czech levels things up in the third, with a much better service game.

Zverev 3-6 4-6 4-3 Berdych: This is exciting. Berdych breaks Zverev back but it's not easy, and the crowd are roaring on the teenager, who has to stop and gather himself in the midst of the roar.

Zverev 3-6 4-6 4-2 Berdych: The atmosphere of excitement takes a little dip as Berdych hits back.

Zverev 3-6 4-6 4-1 Berdych: Berdych has misplaced his forehand in this third set, and Zverev's dominant serve could now prove decisive.

Zverev 3-6 4-6 3-1 Berdych: And there's his breakthrough. He hollers as he breaks the Berdych serve for the first time.

Zverev 3-6 4-6 2-1 Berdych: Still with serve as Zverev looks for a breakthrough.