United were previously linked with a move for Guarin in the January transfer window when the Colombian, who had also attracted interest from Spurs and Chelsea, looked poised to leave the San Siro after a deal with Juventus had been agreed.
However, the transfer was blocked by Inter Milan’s president Erick Tohir after fans took to the streets to protest against the club’s decision to sell one of their best players to their arch-rivals and Guarin saw out the remainder of the season at the San Siro, where he scored four goals and assisted a further 13 in 35 appearances in all competitions.
These fresh reports suggest United are ready to test Inter Milan’s resolve with an offer of about £18m, a sum that would be hard to turn down for the Nerazzurri who have been operating on a relatively strict budget over the last couple of seasons and for whom the days of summer spending sprees appear to be long gone.
The 27-year-old midfielder, who watched from the bench as Colombia sealed a 3-0 win over Greece on Saturday, made his name at Porto before joining Inter for £10m two years ago, establishing himself as a regular in the Serie A side.
Physically strong and good on the ball, Guarin is a central midfielder by trade but can also be deployed in a deeper role as well as in a more attacking one just behind the striker.
Louis Van Gaal is determined to bolster his options in midfield and with Cesc Fabregas joining Chelsea, Kevin Strootman being injured and moves for Toni Kroos or Thomas Muller looking unlikely, Guarin has emerged as a possible alternative.