When Havertz is playing well, the fact he also does this is very endearing:
Man's a machine.
Although I've got a feeling all our players—and especially our midfielders—used to run higher distances on average during the years before Arteta (I'm sure Ramsey used to average 12 or 13 km a match for instance?).
I guess the extreme territorial domination we've enjoyed for a couple of seasons must cut the overall distances down, as well as pushing our defensive mids and centre halves up the list ahead of our creative mids.