Has there ever been a more enigmatic footballer than Paul Pogba?
On his day, the French midfielder is a powerhouse, a player capable of doing the unthinkable in the biggest of games.
During the World Cup final, he bossed the game from the middle of the park and scored one of the decisive goals that made his country champions.
However, those days when Pogba looks like a world-beater or has the right attitude are few and far between.
Like Mesut Ozil at Arsenal, he is high-earning and that makes him a likely candidate for vilifying and scapegoating. That's something that's happened on a frequent basis at Old Trafford. When United don't play well, Pogba is often the go-to man.
In some instances, you can understand why. The midfielder cost a world-record fee at the time of £89m when he arrived from Juventus in 2016.
Having come through the United academy, this wasn't the best pieces of business, but when you assessed his record at Juventus you'd be a fool to turn down the opportunity of bringing him in.
In Turin, Pogba was breathtaking. He'd score goals from impossible distances and bring the effervescent vibes of Wile E. Coyote to the party.
In total, the 27-year-old scored 34 goals and laid on 40 assists in 178 matches for the Old Lady. Why, therefore, is he getting slack in England? He often cuts a dejected figure at United but his record is remarkably similar.
Pogba has netted 33 and assisted 34 in 165 games since arriving four years ago. Of course, the consistency has been questionable, but that's not bad at all - especially when the comparisons often draw us back to his days in Italy.
Yet, it all comes back to the age-old debate of finances. The fact of the matter is that they haven't got value for money. You only need to look at the figures to understand that.
Transfer fee: £89m
Weekly salary: £290k
Annual salary: £15m
Total salary since signing: £60m
Accumulative spend: £149m
Cost per goal: £4.5m
Cost per assist: £4.3m
Cost per game: £892k
*without playing bonuses
Now, we know United have lots of money, but Pogba has essentially been bleeding Ed Woodward dry over the last few years. Barring the 2018/19 season he hasn't really been worth the considerable investment made.
During that term, he scored 13 and provided a further nine assists in the Premier League. His tally since? One goal and three assists.
It's clear to see why there are concerns over his performances, and that's only elevated when you realise that in order to keep him at Old Trafford, Man United must give him a pay rise.
Reports in October revealed that although they wouldn't hand him the astronomical figures Alexis Sanchez earned - £400k plus - he'd still be in line for a raise if he stays.
At present, Pogba is contracted with the Red Devils until 2022 so they'll have to get something sorted sooner rather than later. Losing him on the cheap would not be ideal considering how much they've forked out in the last four years.
However, have United now stumbled upon a way to use him? For better or for worse, Pogba is now benched and finds himself in a similar position to someone like Ozil.
One of the club's highest-paid players, he can't even get in the starting line-up.
The midfielder hasn't started since the 6-1 defeat to Tottenham but he did play a vital role against PSG in the Champions League. Coming off the bench, he gave United some extra pizazz as Pogba provided the assist for Marcus Rashford's winner.
All we need now is to see those qualities on a more frequent basis.
After all, at the moment he is costing the club £4.5m per goal, and £4.3m per assist. Ole Gunnar Solskjaer desperately needs to extract more from Pogba.