First, at 12:22, Mane received the ball off of a header and sped past the defense. He angled past Shay Given down the middle for his first goal after Given saved his first attempt.
For his second goal, at 13:46, Mane played an attempt off of Southampton forward Shane Long, who was saved by Given as well. Mane cleared up on the left corner and scored on the near post for his second goal of the match.
To cap the hat trick, at 15:18, Mane received a past from Southampton forward Graziano Pelle down the middle of the penalty box. Mane took a one-time crack to the the left hand corner and beat Given a third time to give Southampton a 3-0 lead.
Mane has 10 goals in his first season with Southampton in 2014-2015.