Barkley is in contention to play against former club Everton for the first time on Sunday, 10 months after moving to Stamford Bridge from the Toffees.
Chelsea head coach Maurizio Sarri admitted that he was pleased to escape with a 1-0 win over BATE Borisov after claiming his side had "all the conditions to play badly" on a freezing night in Belarus.
Everton have won three of their last four Premier League games to hoist themselves up to ninth place in the Premier League table.
"At the beginning, in the first month, Ross was in trouble", he said.
"I think it's better for him to stay fit, with two or three training sessions, than only with matches".
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'Barkley at the moment from a tactical point of view is a step ahead of Loftus'.
"He is a complete player", Sarri said. He has physical qualities.
"We had a very good win against Leicester and we were competitive in all of them". He kicks well with his left foot and his right.
"At Chelsea, I knew I'd improve a lot quicker around better players, world-class players". "He is on the way to becoming a very important midfielder, not only for us but also for England".
Fabregas and Ruben Loftus-Cheek, who has a minor back problem, are the only doubts.
However, the 27-year-old has been stalling on signing a new contract at Stamford Bridge for the best part of a year and he has made no secret of the fact it is his childhood dream to one day play for Spanish giants Real Madrid.