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Ronald Koeman has told Jose Mourinho that he should take football lessons from his nemesis Arsene Wenger.

The Southampton boss reckons Chelsea have lost their killer instinct under Mourinho and that they should throw off their defensive shackles and try to emulate Wenger’s Arsenal.

Koeman, who saw his Saints team recover from a goal down to beat Chelsea 3-1 at Stamford Bridge last week, has urged Mourinho to go on the offensive during games rather than attacking referees in his press conferences.

He said: “Chelsea prefer to defend when attacking is also an option.

“Mourinho always chooses to defend. Even if his team goes 1-0 up, they would rather defend their lead than try to score more goals.

"Yet Arsenal can kill an opponent. That is why their victory against Manchester United was so impressive.

“Attacking-wise, they completely destroyed United. For 20 minutes, they played the most fantastic football, while Chelsea do the opposite thing.

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“By defending, Chelsea give their opponent a chance to come back in the game. It was a shame that Mourinho was putting attention on the referee after we beat them.

“He wanted to have a penalty in the first half. But, in the first half at Stamford Bridge, Southampton should have had two penalties.”