Patrick Bamford's 16th goal of the season and a first Premier League strike from Tyler Roberts ensured that Marcelo Bielsa's Whites recorded a third consecutive victory for the second time this season.
The win put Leeds on to 56 points for the campaign and Graham Smyth, the YEP's chief football writer, hands out the scores from the display at St Mary's.
13. Pascal Struijk (sub)
7 - Helped in the construction of some good moves. Defensively, in that midfield role, was bypassed a couple of times and took a yellow which left him on a tightrope. Photo by Phil Noble - Pool/Getty Images.
14. Gaetano Berardi (sub)
7 - Very steady. Tried to play aggressively and on the front foot when possible. Kept it simple in possession. Photo by Neil Hall - Pool/Getty Images.
15. Peter Bankes (referee)
6 - Missed a few things, including the contact on Bamford in the box. Refused to bow to crowd pressure with several penalty shouts for the hosts that were not fouls.
Photo by Michael Steele/Getty Images.