Championship leaders Cardiff City stumbled as they conceded a late equaliser in a 1-1 draw at home to Barnsley on Tuesday.
Malky Mackay's men had a chance to move eight points clear at the top, but Stephen Foster struck in the dying minutes at Cardiff City Stadium.
Ben Turner had given Cardiff a 59th-minute lead and they looked set to collect all three points as the clash entered additional time.
While the draw is far from ideal, Cardiff are six points clear at the top and nine ahead of third-placed Watford in the battle for automatic promotion to the English Premier League.
Barnsley are two points clear of the relegation zone.
The hosts controlled the first half and went close to going ahead through Craig Bellamy, who hit the post.
It was left to defender Turner to give them the lead, poking home a Bo-Kyung Kim corner.
Barnsley had rarely threatened before Foster equalised in the fifth minute of additional time after Chris Dagnall's strike deflected off him and past David Marshall.
In the day's other game, Sheffield Wednesday moved further clear of the bottom three with a come-from-behind 2-1 win over Millwall at The Den.
Nadjim Abdou gave the hosts a second-minute lead but his opener was cancelled out by a Miguel Llera free-kick just before half-time.
But again there was late drama as Chris Maguire turned in Danny Pugh's corner in additional time, helping Sheffield Wednesday to an important win.