Pep Guardiola said his Manchester City side "don't have a chance" against bitter rivals Manchester United this weekend if they play as they did in their Carabao Cup quarter-final defeat by Southampton.
The Citizens were stunned by the Premier League basement dwellers at St Mary's on Wednesday night after Sekou Mara opened the scoring for the Saints and Moussa Djenepo made it two in five first-half minutes.
Guardiola brought on his big guns after the break, with Kevin De Bruyne and Erling Haaland taking to the field on the south coast, but City - who have won the competition four times under their Spanish boss - were unable to get back in the game.