The Saints midfielder is eager to face his previous employers, and with the Saints sitting four points clear of safety, the 23-year-old also stressed the importance of the match
Following their surprise 3-1 win over Liverpool, an international break means Southampton have had an extended wait to face the Blues, a team that Cork is particularly familiar with, having been at the club for over 10 years.
With the Saints sitting just four points clear of safety, the 23-year-old is eager for his current side to replicate their earlier performances against bigger opposition, admitting that they have used the break to focus on Chelsea's style of play.
"It's quite good to have the rest and to be able to do things like gym work, and it gives us a lot of time to focus on Chelsea and look at the way they play," he told the club's official website.
"It's a massive game, we didn't do too well against them in the FA Cup earlier in the season, but we put in a much better performance in the league at their place.
"We've put in good performances and got good results against the last two big teams that have come to us, so hopefully we can replicate that."
Cork admits he is "well up" for playing Chelsea after Southampton's 5-1 defeat to them in the FA Cup, expressing his urge to compensate for that loss with another positive league result against his old team.
"For me, [playing] against Chelsea is always going to be really good so I'll be right up for it," he continued.
"I loved going back to Stamford Bridge and playing there, and it was a shame we didn't do too well in the cup – but I'd prefer to take points off them in the league rather than win a cup game."