Guus Hiddink felt his side deserved their narrow 2-1 victory despite there being more than a tinge of good fortune about the way the Blues got back into the match at St Mary's.
Shane Long had put the Saints in the driving seat with a smart finish before Cesc Fabregas found the net for Chelsea with what appeared to be a cross rather than a shot.
However, the Blues never gave up on the south coast and boss Hiddink saw Bransilav Ivanovic's late clincher to turn the tables was as a fitting reward.
He said: "I think it was a deserved win for us. They haven't conceded in last six, seven games so it was successful for us.
"We had a setback when we went 1-0 down, it was a present from our defence, but we did very well in the second half. We were well organised and then got the goals.
"Branislav is a very good header, he jumps well and is courageous. Then his execution is perfect.”
Southampton 1-2 Chelsea in pictures:
Long's opener was described as a gift by Hiddink as Baba Rahman's poor back pass allowed the Irishman in on goal.
The Ghana international was hooked at half time and the Chelsea manager did not try to hide his disappointment with the full-backs error.
He added: "I don't want to make a fake injury. I took him off because of the error. He has to cope with that. He was very down in the locker room about his mistake, but we have to make decisions like we did.
“I can wait and wait but sometimes you have to be harsh. Kenedy did well. Sometimes you have to take decisions. It's harsh but I have also to control and not always wait for the decisions.”
Hiddink also revealed Pedro was withdrawn due to a hamstring injury.