Kasimpasa midfielder Mahmoud Hassan's contract carries a €5m buyout clause.
Trezeguet enjoyed an impressive season for the Super Lig side as he scored 13 goals in 31 appearances to help Kasimpasa to an eighth-place finish.
Kasimpasa officials have confirmed Premier League interest in Trezeguet, where Watford are particularly keen.
He was selected to play for Egypt at the World Cup in Russia.
Any decision on Trezeguet's future is likely to wait until after Egypt's participation in the World Cup is over.