The Manchester United captain is six goals behind England’s all-time record goal-scorer Sir Bobby Charlton after scoring three goals against San Marino and Estonia.
Because of this adaptability he sometimes finds himself in areas where we has less chance to score goals
The 28-year-old is currently serving a three-game domestic ban after earning a straight red card during a 2-1 victory over West Ham United last month.
And former United midfielder Sadler feels Rooney has been a victim of his own versatility, regularly being played out of position in the Red Devils side.
“I do think though it has been a long time since we have seen what you would consider to be the real Rooney and the top quality player he can be,” Sadler wrote in his Manchester Evening News column.
“Because he is an all-round good player he seems to be filling so many different positions. I will, however, get really worried if he starts playing in the back four.
“And because of this adaptability he sometimes finds himself in areas where we has less chance to score goals which is what we all want to see him do.”
Rooney has scored three goals in six Premier League appearances this season.
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