The January transfer window comes even closer; clubs across the Premier League will be identifying potential transfer targets and enduring discussions with clubs and agents over future contracts.
New Premier League players signed on January 1 or 2 will not be available for match week 21, but they can be made available for the following match weeks
The window for the Premier League will close at 11 pm on Friday 31 January 2020.
Forbes have provided the best and worst-case scenarios for Chelsea during the January transfer window.
Best
Nathan Aké, Jadon Sancho and Timo Werner sign with the club. Olivier Giroud, Willian and Pedro sign new contracts or leave for a nice fee. N’Golo Kante stays put.
Worst
N’Golo Kante is sold. Olivier Giroud, Willian and Pedro decide to leave on free transfers in the summer. No new signings are made.
Source-
Forbes