According to the BBC, Chelsea's sale of Hall is extremely critical, otherwise it would not be possible to register for new players in the Champions League. The sale of Hall is particularly critical, as UEFA's recent penalties for violations of fiscal regulatory regulations indicate that the club must sell players from the previous UEFA squad this summer to ensure "transfer revenue and expenditure are positive".
Otherwise, new players like Joao Pedro, Gittens and Drapp will not be registered for the Champions League by September.
Now, Chelsea is still seeking to further strengthen the midfield and is negotiating with Leipzig's Xavi Simmons on the transfer.