Chelsea duo N'Golo Kante and Reece James are in contention to face Brentford on Saturday after regaining fitness.
Kante was forced to self-isolation after testing positive coronavirus and the Frenchman resumed training on Tuesday. James has also resumed training after recovering from an ankle problem that saw him miss the international fixtures.
"Two key players have returned to Chelsea training to provide Thomas Tuchel with a welcome boost ahead of Saturday's trip to Brentford," read a Chelsea statement.
"Midfielder N'Golo Kante has returned to full training at Cobham following his period of self-isolation, whilst Reece James was also involved after withdrawing from the England squad last week due to an ankle injury picked up in the game against Manchester City."
The Blues are sweating on Romelu Lukaku's fitness after the Belgian picked a muscle soreness while on international duty.