Chelsea boss Graham Potter was surprised by the defensive approach of World Cup teams this year.

From Potter's point of view, the most interesting tactical aspect he spotted at the World Cup was the defensive strategy the teams deployed.

"They were mostly relatively passive," he pointed out.

"There wasn't too much pressing, or pressing high. It was a bit more of a drop-off. It could be down to a bit of everything. The heat plays a part.

"Also, if you're going to coordinate any pressing, you'd argue you need some time to work on that. With the lack of time the international teams had, you have to select with what you need to work with and what the priority is.

"Dropping off and defending that way is an easier way to do it, because you haven't got the time to make it any more progressive."