Former Manchester United defender Paul Parker has said Marcus Rashford must improve if he wants to be the Red Devils' primary striker.
The England international has featured as a No. 9 under Ole Gunnar Solskjaer this season after Romelu Lukaku and Alexis Sanchez departed for Inter Milan.
The Norwegian is trusting Rashford and Anthony Martial to score goals for his team, but Parker has said the 21-year-old is "not doing enough" in his position.
Speaking to Alexander Netherton of Goal, Parker said Rashford needs to continue his development and that United should consider signing a new No.