|Sammon 85||Venue: Pride Park
MILLWALL were beaten 1-0 at Pride Park on the final day of the season but favourable results elsewhere kept them in the Championship.
Conor Sammon scored the only goal of the game five minutes from time, but Peterborough's loss at Crystal Palace saw them drop down into League One along with Wolves and Bristol City.
Boss Kenny Jackett made one change to his starting line up from the goalless draw against Crystal Palace in midweek, with Liam Trotter replacing injured winger James Henry.
Trotter had the first chance of the game in the third minute when he latched onto Andy Keogh's through ball and shot across goal, but his effort was blocked by a Derby defender.
In the 19th minute, Keogh's slide-rule pass fed Liam Feeney, who tried to go around Adam Legzdins but the Rams goalkeeper made amends for an initial poor clearance by smothering his effort.
Derby dominated possession for long spells, forcing a string of corners, but David Forde was largely untroubled in the visiting goal, although he was coming under plenty of pressure from crosses.
Sean St Ledger's header from Josh Wright's corner was blocked by a defender a yard in front of the line in the 37th minute before Forde was called into action to keep out Richard Keogh from close range.
Shortly before the break, Trotter fired over from the edge of the area after Wright's header into a crowd of players caused chaos and was only half-cleared.
Jermaine Easter, who had come on for the injured Shaun Batt in the opening 45 minutes, saw his acrobatic overhead kick cleared off the line by a Rams defender in the 56th minute.
During Millwall's best spell of the match, Andy Keogh's flick from Shane Lowry's corner was deflected over the bar before Feeney's neat shot on the turn was also turned behind.
With the game evenly poised, Lowry nearly caught out Legzdins from distance when he sent a scorching 35-yard half-volley narrowly over the bar in the 70th minute.
But it was substitute Sammon who broke the deadlock, sliding the ball under Forde from close range after he got goal-side of the Lions' defence to score what proved to be the winner.