Dean Smith admitted that Philipp Hofmann's time at Brentford was frustrating as his two-year stay at Griffin Park came to an end.
The German was signed in the summer of 2015 from Kaiserslautern and struggled for form and fitness, scoring just four goals during his two Championship seasons.
And Greuther Fürth came in and offered the frontman a chance to return to his native Germany with the Bees allowing Hofmann to leave the club.
Smith said: “It was frustrating for everyone. He came in with high expectations and I don't think we ever got to the expectations that ourselves or Philipp had set. I spoke regularly with him about what he needed to do.
“I never felt he got to the level, physically, that was required. He also had reasons for that – he was struggling with his back at times which put him out of training.
“We felt it was better for all parties if we move on. Sometimes these things don't work out.
“I've left a message with him to thank him for his time. His attitude was spot on. He never let his head drop. He always came in to speak to me and his attitude was exemplary.”