Leicester City manager Claudio Ranieri says attacking midfielder Riyad Mahrez would make a mistake if he moves to Arsenal or Chelsea.
Recent reports have claimed that the two London clubs have made contact to sign the 25-year-old.
But the Italian has warned the Algerian that he will not be a "star" anymore if he leaves the Foxes this summer.
"Mahrez for us is very important," Ranieri is quoted as saying by The Sun.
"If he goes into another big team, there are so many stars. Why? Stay with us, it's much better.
"He's our champion. If he goes to another team, there are so many champions.
"He knows me, I know him very well and I understand when he plays so-so and I can permit to stay on the pitch.
"With another manager, when he plays so-so there are so many other stars – they put him on the bench.
"It's important you give him confidence. But if you put him on the bench he gets down."