United's central defensive pairing this season has been shaky. Rio Ferdinand is not getting any younger and is injury prone. Nemanja Vidic has also battled injury problems.
The young core of Phil Jones and Chris Smalling have only just returned from their injuries. Jonny Evans, when he has been given the central defender job, has looked out of place.
The right-back position has also been one of scrutiny. Rafael's inconsistency and his lack of concentration must have Sir Alex Ferguson to sign another young right-back.
Enter: Ricardo van Rhijn.
Already a Dutch international at the age of 21, Van Rhijn's aerial prowess and his physical attributes would shore up a United defense battling injuries and consistency this season.
Van Rhijn was spotted as a youngster playing the center defense position at his local football club. He was then subsequently signed to Dutch powerhouses Ajax, and had been Gregory van der Wiel's deputy at the right-back position, until van der Wiel's move to Paris St-Germain.
Since then, Van Rhijn has not taken a step back and has proven to be a rock at the right-back position for Ajax. He has also been primarily used as a right-back for the national team as well.
With Sir Alex Ferguson looking for another right-back in light of Rafael's inconsistent play, Van Rhijn could also be a great fit at the RB position. And if the center-backs have defensive issues or injuries to deal with, Van Rhijn could also be a adequate replacement at that spot.