Everton have told Manchester United they must pay £65 million to have any hope of luring striker Romelu Lukaku away from Goodison Park, according to The Sun.
The Toffees signed the Belgian for £28 million from Chelsea in 2014 following a successful loan spell, and the in-form forward is now being labelled as one of the hottest properties in world football.
Lukaku has scored 15 goals in 22 league games this season, level with Jamie Vardy as top goalscorer in the Premier League and a vast improvement on his ten strikes last season.
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United, meanwhile, have struggled to find the net throughout the current campaign and it's understandable why Louis van Gaal may pinpoint the Belgium international as the answer to his problems.
However, the issue remains Everton hold Lukaku in high regard and will do everything in their power to ensure he stays on Merseyside.
Manager Roberto Martinez is a particular admirer of his striker and was full of praise following the Toffees' 3-3 draw with Chelsea last weekend.
According to the Liverpool Echo, he said: "Our attacking play has been outstanding throughout the season and Romelu has been a focal point of that."
The Spaniard also dismissed claims that his side have become reliant upon the Belgian to produce the goods in front of goal.
"You want the goalscoring threat to come from many different angles and at the moment, we are very pleased," Martinez continued.
"We are a team with the biggest amount of goals from open play after a long time in the league and that is a major, major example of the quality we have in the squad."
The 22-year-old Lukaku still has three years left on his five-year contract, suggesting Everton will stand firm and reject any interest for their prized asset, just like they did with John Stones last summer.
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