Walsall came out on top in the battle of the front runners in Nationwide Division Two, Pedro Matias and Darren Byfield getting the goals against deposed leaders Reading, who replied through Jim McIntyre in the 2-1 defeat at the Bescot.
The clash between the sides lying in third and fourth place ended all square at Millmoor, Gareth Griffiths scoring for Wigan after 76 minutes and Rotherham's Mark Robins making it 1-1 with 10 minutes left.
Millwall were unable to make up ground, held 1-1 at Port Vale where David Brammer cancelled out Dave Livermore's opener for the Lions.
Stoke moved up two places after a 2-1 win at Wrexham where they led through Peter Thorne's 16th minute goal and Stefan Thordarson's 27th minute penalty. Darren Ferguson pulled one back with a 66th minute spot kick.
Bury ended a five match losing streak with a 1-1 draw at home to Luton. Adrian Littlejohn put the Shakers in front after 47 minutes only for Petri Helin to level for the Hatters nine minutes later.
Bristol City made it 11 games unbeaten with a 4-0 demolition of Notts County.
Cambridge ended a four match losing run with a 1-1 draw with Brentford, who had Andy Scott to thank for a last gasp equaliser after John Taylor gave the Light Blues the lead after 33 minutes.
Oxford United stay rooted to the bottom after a fourth successive defeat, going down 1-0 at home to Bristol Rovers. Stephen Foster was the hero for the Pirates.
Jamie Forrester netted goal number 11 to put Northampton on the road to a 2-0 win at Colchester, Steven Howard bagging the other.
Bournemouth beat Peterborough 2-1. Jermaine Defoe put the Cherries in front, David Farrell equalised for the Posh, and Warren Cummings netted the winner in the 84th minute.
Oldham failed to pull off a third successive home win after Paul Jones put them in front against Swansea. Jason Smith made it 1-1.
to bring the Swans only their second point in four games.
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