Galatasaray are reportedly close to signing Adem Buyuk and Ryan Donk from Kasimpasa in January.
The Istanbul giants have met with both players agents and will meet with Kasimpasa to negotiate a transfer fee.
Donk has been playing in Turkey since moving to Kasimpasa from Club Brugge in July 2013 for an undisclosed fee.
The 28-year-old has made 13 appearances for Kasimpasa in the league this season.
Adem has scored six goals in 12 appearances for Kasimpasa this season.
The former Manisaspor striker joined the Istanbul side in June 2012 on a free transfer.