Mason Mount scored from the penalty spot to cancel out Minamino’s first-half strike.
The Blues were dominant with the possession from the off however they were let down by the lack of action in the final third.
Southampton, in turn, struck first with the help of Liverpool loanee Takumi Minamino around the half-hour mark, presenting more problems for the visitors.
The Blues levelled the score early on in the second half, with Mason Mount making no mistake from the penalty spot.
The Saints could have put a dagger in Chelsea’s heart as Jannik Vestergaard’s header bounced off the crossbar.
Mount, who was the Blues’ best player in the second half, created a moment of magic when he dribbled past the defence before whipping in a cross to Reece James. However, the Blues right-back made a mess of the opportunity, much to the dismay of manager Thomas Tuchel.
The Saints, although conceded a goal an equaliser, would be happy to pick up a point for the first time since their win against Liverpool in January.
Chelsea’s complacency in the final third was a major let-off today and it would be one of the things Tuchel wants to work on in the upcoming games.
Despite the draw, the German manager is yet to face his first defeat with the Blues.