Barnsley drew 1-1 at home to third-placed Huddersfield Town in a Yorkshire derby on Saturday.
The visitors, who had won their previous six league games, took the lead in the 18th minute but Marley Watkins levelled with a quarter of an hour to play.
The Reds had to produce several clearances off the line while goalkeeper Adam Davies had an excellent game. The result cut the gap between Barnsley and the top six down to eight points since Sheffield Wednesday lost at Leeds United earlier in the day.
Head coach Paul Heckingbottom – who watched the game from the stands as he served a touchline ban – made two changes to the side that lost at home to Brighton and Hove Albion a week earlier. Tom Bradshaw and George Moncur dropped out with Alex Mowatt returning alongside Josh Scowen, who had recovered from an ankle injury sooner than expected.
Mowatt played on the right wing in a 4-4-2 with Ryan Kent on the left and Marley Watkins partnering Adam Armstrong up front. But they soon changed to a 4-5-1 with Armstrong on his own up front as Huddersfield began to dominate the game.
The Reds thought they should have been given a penalty in the 14th minute when Kent went down in the box after contact with Chris Schindler. But it was Huddersfield's other German centre-back Michael Hefele who opened the scoring four minutes later when he headed in Aaron Mooy's corner via a deflection.
Colin Quaner's shot from the left of the box was easily saved by Adam Davies while the Huddersfield's goalkeeper Danny Ward was first brought into action after 27 minutes when he gathered Angus MacDonald's flick header from Marc Roberts' throw at the second attempt.
Davies then made impressive one-on-one saves from Izzy Brown and Mooy with ten seconds as Huddersfield cut open their home defence with some good passing football.Barnsley looked brighter early in the second half, although Matty James had to clear off the line from a shot by Jon Stankovic, who had just replaced the injured Schindler.
But Barnsley competed much better in the second half and levelled when Marley Watkins volleyed in a left-wing cross from substitutive Adam Hammill.
The visitors almost levelled a minute later when Brown again went through and rounded Davies but Roberts produced an unbelievable save off the line before Yiadom blocked the rebound.
Davies then did well to keep out a very powerful Quaner volley from the left corner of the area then James made another block on the line, this time from Hefele.
Barnsley almost got a winner when another long through by Roberts was headed by substitute Bradshaw and cleared off the line.
Roberts once again cleared off the line deep into injury-time when Brown was again free in the box and looked certain to score following a good move down the right.