Manchester United striker Carlos Tevez believes the demands of English football have lessened his threat in front of goal.
The Argentina international has scored just once this season and he feels his form has been affected because of the work he has to do for the team in a highly-competitive Barclays Premier League.
"I'm not as dangerous. I'm not as effective in the penalty area any more," he said.
"That is something I have lost and I have to get that back. I used to score better goals, great goals," he added.
"But something strange has happened. I think it has to do with the fact that the person up front has to do a lot more for the team than just score goals.
"They have to play more for the team and I think I have sacrificed myself recently with regards to that aspect."
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