According to Jamie Sanderson of Metro, the 27-year-old's versatility is something that David Moyes is attracted toward, Guarin playing in central midfield this season but also in more advanced positions and even up front on occasion.
The 27-year-old is valued at £15million but it’s thought that United hope they can get him for around £10million, with negotiations ongoing.
However, while Guarin might be a malleable asset for the Nerazzurri, his versatility points to a certain jack-of-all trades, master-of-none approach, which is something less than what David Moyes should be considering right now.
There are several players within the Red Devils' squad capable of playing in multiple positions, adding depth to the roster, but not really giving off a sense of world-class talent in any one role—which is precisely the standard that United should be aiming for.
Ashley Young, Antonio Valencia and Danny Welbeck have all shown their range of playing outlets this term but have all failed really to hit the heights that have come to be expected of a Premier League champions, fitting in where needed more than anything.
In this sense, Guarin wouldn't necessarily be an upgrade to the squad but more of a sideways manoeuvre, adding depth to the side.
However, even the manager himself has hinted that beefing up the size of his squad isn't among his priorities right now, David McDonnell of the Mirror reporting Moyes as saying:
The question I got asked was, ‘Is the squad big enough?’ and I said, ‘Yes, the squad is big enough.’
Your question [is the squad good enough] is slightly different. I believe the squad is big enough, yes.
Richard Keys and the Independent's Miguel Delaney would both back up this sentiment:
According to Transfermarkt.co.uk, Guarin has three goals and three assists to his name in Serie A this term, starting in all 15 of the club's league matches.
However, in order to see United to get back to their triumphant ways, another level of quality is required. That's not to say the English giants need to pay extortionate amounts to bring in the necessary players as there are undoubtedly bargains out there, but Guarin isn't one of them.
At 27 years of age, United would be paying a premium for the Colombian international nearing his prime but not consistently showing standards of which Moyes should be targeting.
If, as Moyes says, his squad is indeed big enough, then the Scot is better off taking the tack of his predecessor Sir Alex Ferguson and should wait for the right deals to present themselves, rather than leap at anything less than sufficient.