Middlesex's LV= County Championship title challenge took a serious blow as they lost to Derbyshire by 56 runs, despite some lower-order heroics from Ollie Rayner and Gareth Berg.
Coming in at eight and nine, the pair put on 85 for the eighth wicket as the visitors briefly threatened to pull off an unlikely victory, having earlier collapsed to 121/7.
Berg's dismissal for 71 however left Rayner, who finished with 46 not out, too much to accomplish with the final two members of the Panthers' line-up, who succumbed shortly after.
Resuming on a perilous 25/2, Middlesex were given hope by the presence of the prolific Sam Robson and the fact that one of the two men out was nightwatchman Steven Finn.
Despite a steady start from Robson and fellow Australian Adam Voges, Middlesex lost 5/60 in quick succession - a spell which ultimately handed the victory to the hosts.
Mark Footitt was the standout member of an excellent Derbyshire bowling outfit, taking 4/65. Teenage off spinner Peter Burgoyne took 3/66.