Telstar owner Odette Otte says his club expects to lose its top players amid Celtic's links to striker Youssef El Kachati.
It was reported last week that the Parkhead club are tracking the Moroccan frontman, who has scored 19 goals in the Dutch second tier this season.
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The 25-year-old is available on a free transfer this summer and can play on either wing.
Otte recently opened up on the future of his club's star man: "After such a good season, and you are mega in the picture as Telstar, I think that good performances have not gone unnoticed," he said [NRC via RecordSport].
"As long as we cannot offer the budget of club X, we are just a springboard. We have to embrace that role.
"But the players have to want to jump very high. Otherwise, you do not fit in at Telstar."
Celtic manager Brendan Rodgers wanted to sign a number nine in the January transfer window after Kyogo Furuhashi swapped Glasgow's east end for Rennes.
His wish never came to fruition, though, as the Scottish Premiership champions failed to find a replacement for the Japanese frontman.
It remains to be seen where they may look to strengthen this summer.
One thing we do know is that Kieran Tierney is returning to the club. His free transfer from Arsenal will officially go through on July 1.
Also now available for nothing is Jeffrey Schlupp. His permanent Crystal Palace exit was announced on Wednesday. The Ghanaian spent the second half of the campaign on loan at Celtic.
