Next up, it’s Stan Wawrinka versus Juan Martin del Potro and the players are warming up.

WAWRINKA 7-6 4-6 6-3 6-2 DEL POTRO: GAME, SET, MATCH! Del Potro is visibly emotional as what seems like hundreds of Argentine shirts stand up to chant his name. But it can’t inspire him to an unlikely comeback as Wawrinka serves it out. He’ll now meet Kei Nishikori in the semi-final.

WAWRINKA 7-6 4-6 6-3 5-2 DEL POTRO: Heavy hitting from the Argentine for a love hold but Stan will serve for a place in the semi final.

WAWRINKA 7-6 4-6 6-3 5-1 DEL POTRO: Yup, Delpo definitely looks a done deal now. Stan flowing with confidence and the Argentine visibly deflated. An ace seals a love hold.

Is he done?

WAWRINKA 7-6 4-6 6-3 4-1 DEL POTRO: Del Potro is on the board in the fourth with a hold to 15 but the deficit is surely too big to overcome. Still needs to break back twice.

WAWRINKA 7-6 4-6 6-3 4-0 DEL POTRO: Del Potro now casting a thoroughly deflated figure as Wawrinka races to 40-0. The Swiss wobbles slightly with a couple of unforced errors but Delpo then nets and he looks done.

WAWRINKA 7-6 4-6 6-3 3-0 DEL POTRO: BREAK! Wawrinka rips a backhand from ‘down town’ to surprise Del Potro before the Argentine nets to put himself in trouble at 15-30. A mishit forehand levels matters before another double fault gives Wawrinka another break point. And the Swiss rips another spectacular backhand winner to go up a double break. All over?

WAWRINKA 7-6 4-6 6-3 2-0 DEL POTRO: Del Potro unleashes another forehand, still able to find an extra gear when he needs it. Stan seems flustered and screws a backhand well wide but the Argentine then starts missing himself, going for too much before a stunning return brings break point. But the Swiss digs deep and holds with a forehand winner. Could be crucial.

WAWRINKA 7-6 4-6 6-3 1-0 DEL POTRO: BREAK! Del Potro shakes his head after getting beaten by a lob of the highest quality and the Swiss follows up with another lob, this time on the volley. A poor drop shot goes unpunished but De Potro’s legs suddenly look slightly heavy and he concedes the early break with a double fault. Is that decisive?

WAWRINKA 7-6 4-6 6-3 DEL POTRO: SET! A lovely drop shot gets Del Potro back on terms at 30-30 but Wawrinka earns set point with a cry of ‘come on!’ and closes it out with a big serve.

WAWRINKA 7-6 4-6 5-3 DEL POTRO: BREAK! Del Potro saves three break points with nerveless hitting but can’t stave off a fourth as Wawrinka drills a lovely backhand up the line.

WAWRINKA 7-6 4-6 4-3 DEL POTRO: We seem to be going through a phase of simple love holds for the first time as Stan piles the pressure back on Del Potro. Approaching the business end of the set now and possible the match. Massive game for Delpo coming up.

WAWRINKA 7-6 4-6 3-3 DEL POTRO: easy peasy for Delpo as another love hold levels things up once more. Who blinks first?

WAWRINKA 7-6 4-6 3-2 DEL POTRO: Stan starts off with an ace and then a nice wrong footing volley. A lovely half volley drop shot puts him further ahead before an ace rounds off a love hold.

WAWRINKA 7-6 4-6 2-2 DEL POTRO: Stan isn’t happy that a cold neck towel isn’t ready for him at the change. His mood won’t be helped any more by a comfortable Del Potro hold to love.

WAWRINKA 7-6 4-6 2-1 DEL POTRO: It may be getting very late but this tennis is keeping all entertained with some sparkling rallies. Really heavy hitting from both ends and Wawrinka holds another close game to 15 as Del Potro nets.

WAWRINKA 7-6 4-6 1-1 DEL POTRO: Magnus Norman applauding his man as he opens with a backhand winner but he then hits long trying to repeat the trick. But that’s as good as it gets for Stan as Delpo holds to 15.