Celtic defender Mo Camara has completed his move to Derby on a three-year deal.
The Guinean full-back was Gordon Strachan's first signing as Hoops manager in June 2005 and earned a Bank of Scotland Premier League winners' medal last season.
But the 31-year-old former Burnley full-back had been warned first-team opportunities would be limited this season.
Strachan said: ‘Mo has moved on because he could not get a regular game and I couldn't give him a 100% commitment that he was going to play every week. He has got a nice deal at Derby, which is great. He is a smashing lad and we wish him all the best.’
