It may be a little late to be tinkering with formations, given the new Premier League season starts this weekend, but a number of teams changed systems with the previous campaign well under way.
Indeed, as Chelsea and their 3-4-3 formation set course for the title, after a bumpy start, a number of rival clubs - including Arsenal and Tottenham Hotspur - followed suit and switched to a three-man defence.
Until now, that option would not have been available to Rafa Benitez at Newcastle United, with Paul Dummett, the club's only senior left-back, desperately unsuited to a wing-back role.
However, that could all change with the arrival of Kenedy, the Chelsea winger-cum-defender who, according to the Chronicle, is on the verge of signing a loan deal on Tyneside.
Kenedy arrived at Stamford Bridge as a forward in 2015 but has slowly moved further down the pitch - and could now become Benitez's answer on the left-hand side.
The 21-year-old, a fine athlete with experience of playing a left-sided wing-back, would work well on the left of a four or five-man midfield, with DeAndre Yedlin on the other side.
It is a system that would also make room for captain Jamaal Lascelles alongside Florian Lejeune and Ciaran Clark in defence, while it could push Newcastle's wingers higher up the pitch in games where they are missing Jonjo Shelvey's creative influence.
It remains to be seen whether this is a formation Benitez wishes to trial, but Kenedy's arrival would at least give him the opportunity to do so.