Callum Hudson-Odoi will report for pre-season training early in order to work on his fitness ahead of the new campaign.
The Chelsea squad are due to return in early July but Hudson-Odou and Ben Chilwell will be back before then.
Chilwell this week resumed full training after missing most of the season because of anterior cruciate ligament damage.
Hudson-Odoi, meanwhile, has been struggling with an Achilles injury and has not featured since the FA Cup tie against Luton on 2 March.
The 21-year-old winger has not made a league appearance since January.
“He is in individual training, progressing, but not in team training,” explained Blues boss Thomas Tuchel.
“He will come early in pre-season, like Chilwell, to start a programme to be back on July 2 with team training.”