Swann added: “All the great run-getters are different. I’ve been lucky enough to share a dressing room with a couple: Alastair Cook seemed to just loving batting for hundreds and hundreds of minutes.
“A full day of batting to him wasn’t a big deal, the challenge was to bat for two days. Kevin Pietersen on the other just wanted to score and do it quickly by dominating bowlers.
“Joe Root is somewhere in the middle, who happily bats time but is always looking to stay ahead of the bowlers, and that’s why I think he’s the best we’ve ever had.
“The key to spotting a truly world class player is that when they are in nick, they look absolutely impregnable, and he looks like that at the moment.