Besiktas star Cenk Tosun is a target for Crystal Palace.
The Daily Mail says Palace will make a second check on Besiktas striker Tosun when he plays in the Champions League this week.
Eagles director of football Dougie Freedman saw Tosun score twice for Turkey against Finland in a World Cup qualifier last week.
The club will follow up their interest by watching again when the 26-year-old faces Monaco on Tuesday.
He has scored six times this season but is in the final year of his contract in Istanbul.