A late Sergio Aguero goal has moved Manchester City a step closer to the quadruple.
The second half substitute scored an injury time winner to hand City a 2-1 win over Bristol City in the opening leg of their League Cup semi final.
The Championship side, who beat Manchester United in the last round, led at the break thanks to a Bobby Reid penalty.
The Premier League leaders however came from behind, to remain on course to win four trophies this season.
The sides meet again at Ashton Gate in two weeks time and Manchester City boss Pep Guardiola says the tie is far from over.
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Chelsea and Arsenal kick off the other last 4 encounter at Stanford Bridge tonight.
The Gunners will be looking to bounce back from the weekend's shock F-A Cup defeat at Nottingham Forest.
Manager Arsene Wenger admits the pressure is on.
Kick off is at 8 o'clock.
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The odds of Martin O'Neil becoming the new Stoke City manager have tightened.
The Potters are said to on the verge of making the Republic of Ireland boss an offer to return to the Premier League.
Gary Rowett was said to be Stoke's first choice to replace the sacked Mark Hughes, but he has signed a new deal at Derby.
