The Liverpool forward struck for the third time in the past two matches in first-half stoppage-time at St Mary’s, where the Reds went on to win 2-1.
Collecting Milner’s pass just inside the Saints area, Mane held off the attentions of the opposition defence and powerfully whipped a finish into the top corner.
“I thought it was really open between two defenders,” the No.10 told Liverpoolfc.com.
“So when I saw Millie I knew he was going to give me the ball, then I saw the man, no-one was close to me, they stood off and I tried to go a bit outside and put the ball inside.