Gabriel Heinze
Argentine hardman Gabriel Heinze arrived at United from Paris Saint-Germain in 2004 and went on to enjoy three successful years at Old Trafford.
He quickly repaid that £6.9 million Sir Alex Ferguson spent on his services, and became a fan favourite with the Red Devils.
However, he fell out of favour due to the emergence of Patrice Evra, and while a move to Liverpool was rejected, Heinze left for Madrid in 2007.