Robert Snodgrass scored his sixth goal of the season as leaders Leeds left it late to see off Southampton with a 1-0 win at Elland Road.
Jermaine Beckford can expect a telling-off from Simon Grayson after angrily shrugging aside his manager's handshake as he was substituted with 15 minutes left.
Leeds fans reacted by booing their 15-goal leading scorer's petulance and chanting Grayson's name.
Two minutes later Snodgrass scored. Receiving a pass on the left from Andrew Hughes the Scot curled a right-foot shot into the top corner.
It condemned Southampton to their first defeat in eight games and kept Leeds at the summit.
Luciano Becchio, Leeds' Argentinian striker, wasted the best chance of a keenly-contested first half. Unmarked at the near post, he headed over from a perfect cross by Snodgrass in the 38th minute.
Beckford squandered several opportunities, his close control repeatedly letting him down and leaving him frustrated. Southampton put some incisive moves together but found Patrick Kisnorbo and Richard Naylor in commanding form in the Leeds defence.
Bartosz Bialkowski, Saints' Polish keeper, made a flying save to foil Jonny Howson just after the interval and Rickie Lambert fired narrowly wide in injury time.
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