Millwall lost ground in the battle for Championship play-off places as they were held to a goalless draw in a largely lacklustre encounter at relegation-threatened Barnsley.
The Lions went closest to breaking the deadlock when midfielder Shane Ferguson struck the crossbar with a curling free-kick, with keeper Jack Walton beaten.
But Barnsley lifted their game after the break and skipper Alex Mowatt brought a flying save from Bartosz Bialkowski with a 20-yard drive.
The home side almost snatched it in added time when Millwall failed to deal with Mowatt’s ball into the box, but Bialkowski was well-positioned to deny Mads Andersen – and the draw did not really do either side any favours, with only seven games left to play.
The draw left Millwall 11th in the Championship, five points outside the top six, two more than at kick-off, with Barnsley dropping back to the bottom of the table following Luton’s win at Swansea.
Millwall next face the Welsh club at home on Tuesday, when Barnsley entertain Blackburn Rovers.