The 29-year-old, in his last match before he joins up with the Senegal squad for the African Cup of Nations, was booked just 15 seconds after the game got underway.
In a action-packed opening to the game, Mane then capitalised on a mistake from Trevoh Chalobah to put Liverpool 1-0 up after nine minutes.
Sadio Mane caught Cesar Azpilicueta with an elbow just six seconds into the match
Anthony Taylor showed him the yellow card eight seconds later – though some felt he should have been given a red instead
Some fans on social media though felt that the Liverpool forward was let off lightly with his booking and should have been sent off.
A long ball was immediately played out to Mane on the left who while jumping for the ball caught Cesar Azpilicueta with an elbow to the head, with the whistle blown for a foul after six seconds.
Azpilicueta held onto his face in pain as referee Anthony Taylor brandished Mane a yellow card after 15 seconds.
Gary Neville on commentary suggested Mane was helped out by how early the incident was in the game.
He said: ‘It’s not a great one for Mane, it’s six seconds into the game and that’s what has helped him.’
Opta confirmed that Mane’s booking was the earliest in a Premier League game since they started taking down the record at the start of the 2006-07 season.
Mane put Liverpool 1-0 ahead after a mistake by defender Trevoh Chalobah on nine minutes
Former Chelsea star Jimmy Floyd Hasselbaink told Sky Sports at half-time: ‘I think it’s reckless I think it’s a red card for me.
‘He knows exactly what he’s doing. It’s an elbow. I think if you give a yellow card it should be a red.’
Liverpool took the lead after nine minutes when Chalobah’s mistake allowed Mane to hammer home a left-footed strike after showing great composure.
Chelsea fans though felt Mane was lucky to be on the pitch at the time of his goal.
One fan commented on Twitter: ‘Mane scores and he shouldn’t even be on the pitch. Just sums it all up.’
Another user posted: ‘That should have been a red card for Mane. Lucky there.’