The last remaining tickets for Wednesday's game against Brighton at Stamford Bridge are available to buy online and in person at the ticket office.
Tickets are on general sale and are available to a maximum of four tickets per person. They can be bought online by clicking on Brighton tickets.
The match will not be broadcast live on television in the UK.
In the Premier League away game down on the South Coast back in December, Chelsea won 2-1 thanks to goals from Pedro and Eden Hazard. In last season’s home game, the first in the Premier League at Stamford Bridge between the sides, it was second-half strikes from two Spaniards, Alvaro Morata and Marcos Alonso, which powered the Blues to a 2-0 Boxing Day win.