The Blues have prevailed in each of their two matches since the November international break, most recently registering a 2-0 victory over Heidenheim in the Conference League on Thursday night.
Although Enzo Maresca's side will be taking on an out-of-form Villa, there are just three points separating these two teams in the table.
Here, Sports Mole rounds up Chelsea's latest injury and suspension news ahead of making the trip to Germany.
Pedro Neto
Status: Minor doubt
Type of injury: Unknown
Possible return date: December 1 (vs. Aston Villa)
Neto has missed the last two matches with what was initially described as "a problem" picked up while representing Portugal. However, Maresca has suggested that the winger will be in a position to return against Villa.
Malo Gusto
Status: Minor doubt
Type of injury: Illness
Possible return date: December 1 (vs. Aston Villa)
Gusto is another player to have missed the last two games, seemingly through illness. However, the right-back should start for the Blues on Sunday.
Reece James
Status: Out
Type of injury: Hamstring
Possible return date: Unknown
After four successive Premier League appearances, James is again sidelined with a hamstring injury sustained in training. A recent report claimed that the club captain will be sidelined for the rest of the year.
Omari Kellyman
Status: Out
Type of injury: Hamstring
Possible return date: Unknown
Kellyman has struggled with fitness issues since joining the Blues from Villa in the summer; the attacker remains on the sidelines for this match due to a hamstring problem, and it is unclear when he will be able to return.
CHELSEA'S SUSPENSION LIST
Chelsea have no suspension issues heading into this contest.