Following the final whistle for victory over Newcastle, the Senegal international showed his class as he gave his shirt away to a lucky fan.
Billy Ripley, who was attending the match with his dad, was shocked as Mane jogged towards him with the top.
The 13-year-old had taken a sign to Anfield which read: "It's my birthday can I have your shirt?"
Billy later told the Liverpool Echo: "Mane is my favourite player, I was shaking and buzzing."
It was a record-breaking day for Mane as became the first player in Premier League history to play 50 games at home without losing a single match.