Ole Gunnar Solskjaer is bringing excitement back to Manchester United again.
The club was growing stale under the guidance of Jose Mourinho.
Mourinho brought a toxic atmosphere which curtailed the club's progress on the pitch.
However, his sacking and Solskjaer's appointment has turned their fortunes around.
The Norwegian manager had arguably his toughest test as manager when his side travelled to Arsenal in their FA Cup fourth round clash.
However, Solskjaer would make it eight wins from eight as they prevailed 3-1 over their rivals.
After a drab 25 minutes, Alexis Sanchez and Jesse Lingard scored two quick-fire goals to give United a two goal advantage.
Pierre-Emerick Aubameyang pulled one back just before half-time but, United held on and put the tie beyond all doubt when Anthony Martial notched with eight minutes of normal time remaining.
But how exactly did United do it?
A tactical analysis video has emerged in the aftermath of the game, and it shows Solskjaer's 'brilliance'.
The video, posted on YouTube by 'Nouman', shows how United were able to exploit Arsenal's weaknesses by countering.
Watch the video below:
It begins by showing United's aggressive high pressing to start the game.
They only did this for the first 10 minutes, with United then switching to a defensive, counter-attacking tactic.
United allowed Arsenal to have possession, which meant their full-backs pushed up high.
As well as their full-backs, Arsenal's midfield two of Lucas Torreira and Granit Xhaka also joined the attack and failed to provide any defensive cover.
Solskjaer exploited this by leaving Romelu Lukaku and Alexis Sanchez in wide areas to leave 2v2 situations.
When United won the ball they looked to quickly find them two, with their other attacking players, including Lingard, looking to join them as quickly as possible.
Arsenal tried to use an offside trap but failed on multiple occasions, leaving Lukaku and Sanchez to run in behind to create dangerous situations.
It was this tactic that lead to United's second goal.
Man United were also able to hurt their opponents, with Lingard able to find spaces between Arsenal's defence and midfield.
Noumann adds that Unai Emery deserves some blame for failing to change his tactics but, credit must go to Solskjaer for creating a game plan and pulling it off to perfection.