It's easy to forget the classy centre-back is still a teenager until mid-November and the signs were there during his maiden campaign as a Manchester United player that he has sky-high potential, which is why most of the world's leading clubs were alerted to his emergence at Lille.
After the delight at winning the race for his signature, there was a false start in terms of the Frenchman's United career, as he cruelly suffered a foot injury during the tour game against Arsenal in Los Angeles.
By working hard on his rehabilitation, Leny was finally ready to make his Premier League bow in early December.