The transfer window isn’t officially open yet, but Huddersfield Town have already done their best deal of the summer.

Unless Zlatan Ibrahimovic decides to make the John Smith’s Stadium his next destination, David Wagner’s contract extension is by far the best piece of business that has been, or will be, completed before next term.

And even Zlatan wouldn’t be too far ahead.

Cut-price season cards were marketed as the chance to see the “Wagner Revolution”, and it is the manager’s face which adorns the billboards and advertising leaflets.

For it is the former Borussia Dortmund II boss that is the lifeblood of the current Town side.

Video Loading

The new signings are exciting - there are particularly high hopes for centre back Michael Hefele and left back Chris Löwe, both recruited from Wagner’s native Germany. But would either have signed without him at the helm?

His experience, and contacts, on the continent will prove vital in Town’s recruitment strategy and are already bearing fruit.

But perhaps more importantly, his stewardship has seen a drastic improvement in the style of play, and in the players already at his disposal.

Witness the newly-invigorated Joe Lolley, who was on loan at Scunthorpe at the start of the season and by the end was one of Wagner’s main men.

Or the 18 goals from Nahki Wells, Town’s most important player, who has spoken often of the effect the boss has had on improving his game - both through physical training and in the belief he has shown in his abilities.

READ MORE: 'Buzzing!': Delighted Huddersfield Town fans react to David Wagner's new contract

READ MORE: Where does Huddersfield Town's David Wagner stand in terms of Championship service?

If he can improve what he’s been handed, imagine what he can do with the additions he has specifically chosen?

And then there’s the entertainment factor.

Football should be fun, and Wagner would definitely subscribe to that theory both on the field and in his rapport with the fans.

His style is fun to watch, places emphasis on keeping the ball and playing clever passes rather than hoofball. And he can rarely be accused of playing it safe or sending out a defensive-minded side.

In the rough and tumble of the Championship, that’s important.

Only three teams can secure promotion, and there’s a lot of Saturdays between now and next summer. No one wants to dread going to games, even at the prices that Dean Hoyle is offering.

Town chairman Dean Hoyle is pictured when he confirmed the £179 deal for fans

In Wagner, Town also have a man who values his relationship with the fanbase. It started at Birmingham, continued at Forest and was particularly memorable at Leeds and Blackburn, but his full time celebrations with the away support do restore faith in a cynical game.

The manager is always keen to emphasise the role fans can and do play - and he’s always got time for supporters who meet him, whether at organised events or through a chance encounter.

It was a bold move from Hoyle to appoint a manager who is far removed from the traditional box we’ve seen at Town recently.

It’s paying off.

And he’s keen to continue the current revolution and evolution.

So he’s done something about it, and in doing so pulled off the signing of the summer.