Maguire has signed a new £80,000 a week contract with Leicester, reports The Sun.
But Leicester have made it clear they will not let their top players leave without a fight and have worked throughout the summer to hand Maguire a bumper new deal.
Maguire signed the new deal after a whirlwind 15 months following his £17million move from Hull City last season.
The 25-year-old broke into the England squad and was one of Gareth Southgate's key players at the World Cup in Russia.
"Ever since I walked through the door, the support they've shown me is unbelievable, they've really spurred me on," he told LCFC TV upon signing his new deal.
“They helped me have a good season and the support that they showed me throughout the World Cup, I feel like I owe them a lot and I look forward to playing in front of them in the future."