Jasper Cillessen has warned his potential suitors that his club Ajax will make a transfer "difficult" to accomplish.
The 26-year-old has been linked with a move to Manchester United should David de Gea leave the Red Devils to join Real Madrid this summer.
However, Cillessen has conceded that manager Frank de Boer, along with the club's hierarchy, will do their utmost to keep him at the Amsterdam ArenA.
He is quoted as saying by The Mirror: "The Ajax management are going to make it really difficult when the interest becomes concrete.
"If I had planned to leave, I would not have signed a new contract until 2018. My old contract was expiring in the summer of 2016 and in that case this summer would have been the perfect moment to leave.
"Frank de Boer has been very clear when he received questions about my transfer - he wants to block it."
United have also been touted with a potential move for Tottenham Hotspur keeper Hugo Lloris.
