Having defeated League 1 Scunthorpe United in their previous outing in this season's competition, it means the Blues face lower-league opposition once more as they attempt to navigate their way to Wembley for the FA Cup final in May.
While that 2-0 victory over Scunthorpe earlier in January proved a positive affair, it's not always been plain sailing for Chelsea when they have faced teams outside of the top flight.
There have been some major upsets in recent memory, while if we look back at games that predate the Premier League's inception in 1992, Chelsea were on the receiving end of some surprise defeats.
Is there another upset on the cards at stadiummk? We'll have to wait until Sunday to find that one out.
To fill the time between now and then, Bleacher Report takes a look at some of the highs and lows Chelsea have experienced against lower-league sides in the FA Cup.