Their stuttering form has caused them to be knocked out of the Champions League and also drop out of the top four in the Premier League table, to leave their hopes of securing Champions League qualification for next season looking slim.
The home side had already raced to a two-goal lead before Antonio Conte moved to take out Alvaro Morata for Giroud.
Southampton starting XI: McCarthy, Cedric, Bednarek, Hoedt, Yoshida, Bertrand, Romeu, Ward-Prowse, Tadic, Hojbjerg, Long. The French super sub brought one back for the Blues just nine minutes after coming on. And with the lack of confidence that exists within the team, Eden Hazard says he is unhappy with the club's current predicament. The comeback was complete with Giroud's second of the day.
That proved to be a wise descion as Chelsea scored three times in the space of eight minutes to turn the game on its head.
The Saints continue to struggle in the English top flight as they sit third from bottom, three points from safety and on a three-game losing streak. "Chelsea down to 10 men, it could have put a different complexion on things". Willian and Marcos Alonso had been the only bright spots for Chelsea in recent games.
"I think this is not my job to answer this type of question", Conte told reporters in Friday's pre-match news conference ahead of the trip to Southampton. Southampton is now in serious trouble of going down to the Championship and needs other results to help them out of 18th place. First, they play at Leicester on Thursday. This is the best possible way for a player to show he is a fantastic professional.