The 23-year-old is reported to have begun training with the Club days after rejoining the Premier League Champions.
Atsu made a comeback to his parent Club having endured injuries at Bournemouth where he only managed three competitive appearances for the Club.
He was involved in his side’s training session ahead of their Premier League action against Crystal Palace.
The former Rio Ave winger has already had stints with Dutch Club Vitessi Aheim as well as English Club Everton.
Chelsea manager Guus Hiddink will have to take a decision on the player before the January transfer window comes to a close.