Having already signed seven players this window at an eye-watering £183m Chelsea could be still to add their biggest addition of the month. Enzo Fernandez, who many thought may be one of the first through the door, is still at the centre of negotiations over 30 days after the Blues initially made contact with Benfica.
It has now re-emerged as the biggest deal to watch heading into the final hours of the winter window. Fernandez is due to be playing for his side on Tuesday night with kick off in Portugal less than two hours before the deadline for deals.
Due to the negotiations ongoing over his future, there is uncertainty over whether he will be involved in this match or not. Meanwhile, Todd Boehly has his team on a quickfire mission to sign him this window. Other than trying to avoid a scramble over his services in the summer there is another reason Chelsea are trying to act quickly.