According to Goal, Watford and Middlesbrough are interested in loaning Chelsea defender Baba.
At present, the EFL transfer window has not been closed, and the English Champions League teams can now introduce players from the Premier League.
Baba returned to Chelsea this summer and he will be rented out again.
The 26-year-old Baba joined Chelsea at a high price from Augsburg in the summer of 2015. His contract with the team will expire in the summer of 2022.
Baba was loaned to Schalke 04 and Reims by Chelsea. He joined Mallorca on loan last summer.