Lewis Baker is in line for a Chelsea senior return this week.
Baker is one of 12 members of the U23s side that Blues boss Thomas Tuchel has called up to train with the first team in case they are needed to make up numbers.
It is understood Teddy Sharman-Lowe, 18, Josh Brooking, 19, Xavier Mbuyamba, 19, Alfie Gilchrist, 18, Dion Rankine, 19, and Xavier Simons, 18, were all involved in the session on Monday.
As, reportedly, were Lewis Hall, 17, Joe Haigh, 18, Harvey Vale, 18, Bryan Fiabema, 18, and Jay Wareham, 18.
Chelsea face Brentford in the Carabao Cup quarter-finals on Wednesday.
And that could see Baker - who has 17 England U21 caps - brought in to give the likes of N'Golo Kante and Mateo Kovacic the evening off after only just returning to the team, reports The Sun.
The midfielder has been on Chelsea's books since 2005 and made his only senior appearance in the FA Cup way back on January 5, 2014 - 2,908 days ago.
With Jose Mourinho in charge, he came on as an 87th-minute substitute for Oscar in a 2-0 win at Derby, playing alongside John Obi Mikel, Ashley Cole and Mark Schwarzer at Pride Park.
