Patrice Evra is currently in the midst of a true renaissance season.
He has improved his defensive frailties of the past while also becoming a far more potent attacking threat down his favoured left wing.
But at 31 years of age, the Frenchman may only have a couple of good seasons left in him before tired legs begin to take over.
Sir Alex Ferguson may already be considering who he wants to replace Evra in the long term, with a host of candidates having been linked to the club or those already playing in the red of United.
Here are the five most likely options at the time of writing.