Barnsley head into the half-time break leading 1-0 against Millwall in the Championship, thanks to Jim O'Brien's early goal.
The hosts made a dream start to the game when O'Brien rounded David Forde and slotted the ball into an empty net in the fourth minute.
Chris O'Grady then shot over the bar, while Dale Jennings sent a 14th-minute effort straight at Forde as Barnsley threatened to extend their lead.
DJ Campbell pounced on a mistake by the home side, but with Luke Steele stranded in no-man's land, the forward skewed his effort well wide of the target.
Steele then tipped headers from Steve Morison and Scott McDonald round the post as Millwall looked for a way back into the game, but Barnsley held on to take a one-goal advantage into the break.
