Second-half goals from Patrick Bamford, Stuart Dallas and Raphinha sent the Whites tenth - one place and one point above Arsenal. Leeds are now 13 points clear of the dropzone.
Graham Smyth, the YEP's chief football writer, hands out the scores.
7. Stuart Dallas
8 - Played some neat stuff on the left before a switch to the middle, when he played his best stuff. Took his goal very well.
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8. Jack Harrison
5 - A second poor performance in a row. Unable to get into the game to any real degree, had a go on both flanks.
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9. Raphinha
9 - His wing play, getting in behind with his pace, was electric. Created chances and scored a wonderful free-kick. Consistently good.
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10. Tyler Roberts
7 - Should have finished the game with two goals to add to his assist for Bamford's strike. Got in great positions, finishing was off but his performance was steady.
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11. Patrick Bamford
8 - The usual work rate and a clinical finish for his goal. Played his part in creating chances too.
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12. Helder Costa
7 - Worked hard, used his pace to hurt Southampton on the counter attack. Showed a bit of fight, which was needed from the winger.
Photo by Laurence Griffiths/Getty Images.