Free-agent Berbatov is reportedly on his way back to Manchester United to work under Mourinho for a week. <center><img src="http://images.performgroup.com/di/library/goal_uk/2b/ba/manchester-uniteds-most-expensive-transfers-of-all-time-dimitar-berbatov_zc8iu59u15cm15taf5iits41u.jpg?t=147208982&w=620&h=430" width="500"></center> Berbatov will travel to London with his friends before they head up to Manchester. It could be recalled that the former Bulgarian international sometimes in November expressed interest in returning to the premier league as he has been without a club after leaving PAOK in June.