Manchester United boss Louis van Gaal says it is too early to say who is the top striker in the Premier League.
Manchester United captain Wayne Rooney, Manchester City's Sergio Aguero, Chelsea's Diego Costa and Alexis Sanchez at Arsenal are all in great form.
The United boss said: "I don't think you can compare so easily all the strikers because they have their own identity.
"It also depends on the moment.
"Now Wayne is in a great moment and Robin van Persie is not in the best moment of his career but he's a very good striker.
"You cannot say the best striker of the Premier League is Rooney or Aguero."
