Manchester City manager Pep Guardiola said the 4-0 thrashing by Everton at Goodison Park was "awful" for his players.
The Toffees romped to victory over Guardiola's side thanks to goals from Romelu Lukaku, Kevin Mirallas, youngster Tom Davies and new signing Ademola Lookman.
Three of those strikes came after the break as City fell apart and Guardiola suffered his worst league defeat.
But they had threatened to open the scoring through both Raheem Sterling and David Silva before the break and Guardiola told Sky Sports: "We created enough chances in the first half to score.
"We were not able to score and they had one chance and scored.