DERBY County's Championship promotion bid suffered a setback as the Rams slipped to a surprise 1-0 home defeat to strugglers Millwall.
Steve Morison scored the only goal of the game after 61 minutes as the Lions ended a run of seven games without a win.
For the Rams, it was a second successive defeat.
The hosts started well and dominated the opening stages, but could not find a way through and the visitors grew in confidence as Derby struggled.
And Ian Holloway's side eventually took the lead just after the hour.
Lee Grant failed to get anything on Lee Martin's cross from the left into a crowded area and Morison headed into an empty net from close range.
As the Rams threw men forward, they could have gone further behind but Grant was equal to efforts from Owen Garvan and Martyn Woolford.
Derby put central defender Richard Keogh up front towards the end and he twice headed wide from good positions as Millwall held on.