Chelsea have added Reading pair Michael Hector and Lucas Piazon to Guus Hiddink's squad.
Chelsea have recalled the pair from their loan spells at Reading in a bid to give them time to reintegrate into the team ahead of next season.
The duo had been set to stay at the Madejski until the end of the campaign.
A Blues statement read: "Michael Hector and Lucas Piazon returned to Chelsea this week to train with the squad for the remainder of the season.
"The pair have spent the majority of 2015/16 on loan with Reading in the Championship, but are now back at Cobham working with Guus Hiddink and his staff."
But added: "They will not be eligible to play for the Blues in our remaining four Premier League fixtures."