Manchester United legend Rio Ferdinand fears his old side are wasting Cristiano Ronaldo by not playing to his strengths - just like they did with Radamel Falcao.
Ronaldo, 36, has scored eight goals in 16 Premier League appearances since heading back to Old Trafford last summer, while also registering six goals in five Champions League outings.
However, at times the Portugal superstar has cut a frustrated figure in Manchester, with United's poor return of six defeats in the first half of the campaign leaving him disgruntled.
Questions have also surfaced over his suitability for new interim boss Ralf Rangnick's system, which relies heavily on his renowned 'gegenpressing' off the ball.