KENNY Jackett cast fresh doubt over Dany N'Guessan's Millwall future after the striker was substituted just 15 minutes after coming on against Crystal Palace.
N'Guessan stormed straight down the tunnel after being replaced by Liam Trotter and Jackett later questioned the Frenchman's passion during his brief cameo appearance.
Jackett said: "I didn't feel the substitution worked – it slightly opened us up and I needed to address it. You don't necessarily want to do it but to get us over the line, it needed to be done.
"It was a reflection of his performance. I have not spoken to him about it but I don't think there was enough. Playing to instruction and with passion is something you have to do at Millwall.
"I didn't think that was right. It was a decision I had to make. Whether there's a way back for him is a good question. I'll be surprised if he plays at Derby County on Saturday."
N'Guessan asked to leave the Lions last summer amid interest from Charlton but the move failed to materialise and he has since featured 18 times this season.