|The good news for Besiktas Milangaz is that point guard Carlos Arroyo has recovered from his injury|
His presence in the line-up on Monday wasn't able to lift the team to victory.
Arroyo had 11 points and seven assists but Galatasaray, who top the Turkish BEKO Basketbol Ligi standings with a 21-4 mark, won 92-81.
With the setback, Besiktas dropped to fifth place with an 18-7 record.
In their game at Galatasaray, Pops Mensah-Bonsu had 16 points and Marcellus Kemp 14 for Besiktas.
Fenerbahce climbed into fourth place at 19-6 with an 81-48 demolition of home side Olin Edirne.
Besiktas will meet hosts Szolnoki Olaj at the EuroChallenge Final Four on 27 April.