It's time for 23-time major champion Serena Williams against a Grand Slam quarter final debutant in the shape of Italy's Camila Giorgi next up on Centre Court.

GAME, SET AND MATCH!- S.WILLIAMS 3-6 6-3 6-4 GIORGI. The 23-time Grand Slam champion is into an 11th Wimbledon semi final as she comes from behind to defeat Giorgi, who gave it her all in a competitive Centre Court encounter that lasted one hour and 42 minutes. SW served it out to love and will meet Kiki Bertens or Julia Goerges in the last four.

S.WILLIAMS 3-6 6-3 5-4 GIORGI. Camila pushes Serena right to the wire. She holds to love and knows it's now or never to break back. Serena will serve for the match next.

S.WILLIAMS 3-6 6-3 5-3 GIORGI. Aces five and six ease Serena through her umpteenth love hold. She's one away from the semi finals.

S.WILLIAMS 3-6 6-3 4-3 GIORGI. Brilliant from Camila. She produces some more venomous, big serves to take an easy game to 15. She's still alive in this, but it's hard to see Serena giving her the chance.

S.WILLIAMS 3-6 6-3 4-2 GIORGI. It's another love hold for Serena. Time running out for Giorgi to make an impact in this decider.

S.WILLIAMS 3-6 6-3 3-2 GIORGI. Another ace is followed by a double fault for Giorgi, but she manages to stay in touch with a crisp forehand winner to Serena's right flank.

S.WILLIAMS 3-6 6-3 3-1 GIORGI. Another big 'Come on!' from Serena as she consolidates with a hold to 30. She has the breathing space she wanted and is closing in on the last four.

BREAK! - S.WILLIAMS 3-6 6-3 2-1 GIORGI. Serena is ahead for the first time in the match! The American unloads a third return winner of the match to rack up triple break point and converts at the first time of asking with a backhand pass on the stretch.

S.WILLIAMS 3-6 6-3 1-1 GIORGI. Serena levels with an ace to take the game to 15. She's only had one dodgy service game and it cost her the first set.

S.WILLIAMS 3-6 6-3 0-1 GIORGI. A fifth ace and two service winners prove vital as Giorgi gets off on the front foot with a hold to 30.

SET! - S.WILLIAMS 3-6 6-3 GIORGI. A huge 'come on!' from Serena as she serves it out on her third set point to force the decider. We've been here so many times before with the American and there's usually only one winner from here.

S.WILLIAMS 3-6 5-3 GIORGI. The Italian stays focused and unloads some tasty first serves to hold to 15. Serena will now look to serve out the set to tie the match.

Interesting.

S.WILLIAMS 3-6 5-2 GIORGI. The seven-time champion makes short work of another one-sided service game as she cruises to the love hold.

S.WILLIAMS 3-6 4-2 GIORGI. Camila manages to halt some of the Serena momentum, but there's definitely been a notable rise in the calibre of SW's play.

S.WILLIAMS 3-6 4-1 GIORGI. SW23 consolidates to 30 with a crisp backhand up the line. It's looking like we are heading to a decider.