Manchester United boss Erik ten Hag says his players are still months away from enacting his desired style of play.
United beat fellow top six sides Liverpool and Arsenal early in their season but were humbled 6-3 at Manchester City on Sunday and at one stage trailed 6-1.
"It's more, it's physical, it's mental," Ten Hag said. "It's also sustainability, especially. It's like a routine, a way of life and you have to bring it to every training in your system, as a squad and as an individual player.
"And when you had a lack of it in the last years, it's not something that you build or progress in a week or a month, now it's a system that has to be and a demand in nowadays top football.
"And it's quite clear City is the standard in that. There are more teams. But I think also we can deliver that, we have seen it against Liverpool and we have seen it against Arsenal but now we have to do it on a consistent basis, that is what we have to work for now.
"But it will not come overnight, it will also take more than weeks, it will take months."