Andy Cole says he is not sure what Anthony Martial's favoured position is, and has called on the Manchester United forward to "show more desire and passion" on the pitch.
United snapped Martial up as a teenage prospect while he was on the books of Monaco in 2015, forking out £54 million ($69m) to lure him to Old Trafford.
The Frenchman has since recorded 70 goals and 37 assists in 217 appearances in all competitions, but only showed glimpses of his frightening potential under Louis van Gaal and Jose Mourinho.
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Martial has stepped his game up another level since Ole Gunnar Solskjaer's arrival as head coach, having been trusted to lead the line following the departure of Romelu Lukaku.