Loris Karius has had his “enthusiasm for the game” questioned after another error-strewn Besiktas display.
Karius has struggled to convince on a two-year loan in Turkey, keeping just five clean sheets in 26 games.
The Liverpool keeper was jeered by Besiktas supporters after conceding a soft equaliser to Omer Ali Sahiner against Konyaspor on Sunday.
He would be beaten again by Moryké Fofana, only for Shinji Kagawa to rescue him with a stoppage-time winner in a 3-2 victory.
Reports from Turkey even suggested the 25-year-old requested to be substituted, as his post-Champions League final struggles continue.
Besiktas manager Senol Gunes was incredibly supportive, suggesting that Karius has been a bit sh*t since he joined.
“He was at fault for the goals he conceded,” he said.
“Karius has gone a bit stagnant, something is wrong with his electricity, motivation, enthusiasm for the game.
“It has been like that since the beginning. He does not really feel a part of the team.
“It’s something we haven’t been able to work out and, of course, I am partly to blame for this.”
Gunes admitted that Karius has only kept his place because 35-year-old reserve Tolga Zengin is unavailable for selection.
“Something is wrong, he has also been unlucky. [He] is talented but it hasn’t worked out and we have a problem,” he added.
“Let me put it this way, if I still had Tolga available I would play him.”