The transfer window reopens on January 1, and Mourinho already has plans for a sensational signing.
The two clubs have begun the Premier League season at pace, and will also battle it out in the transfer market.
Manchester United is riding high in the Premier League but there is a problem that needs to be resolved in the background.
English football's top tier enters the fifth week of matches this weekend.
United surrendered its perfect start to the league season.
The English transfer window closes at 11 p.m. BST on Thursday. But will these players be forgotten?
Antonio Conte wants at least three players through the Stamford Bridge door by the time the transfer window closes in England on Thursday night.
The transfer window closes at 11 p.m. BST, leaving Jurgen Klopp's team little over 12 hours to complete the late deal.
After a long summer, little over 12 hours remain of the Premier League transfer window. It looks set to be a frantic finish.
The Premier League has spent more than £1 billion already this summer. Was it worth the money?
The Gunners' poor start to the season has made long-term problems worse, and some players want to leave.
Just 48 hours remain in the transfer window. Will your club get the players it needs in time?
United has won three out of three this season.
Antonio Conte has had a busy summer, but the next 72 hours may see his squad bolstered considerably. But how and where will the new additions play?
Former Manchester United star Neville was a fierce critic of Liverpool during his playing career.
Sanchez and Raheem Sterling could swap clubs.
Jurgen Klopp's already lethal team could be about to become even stronger.
The French midfielder, United's most expensive signing, has had a fine start to the new season.
There is only one week of the summer transfer window left to go for Premier League clubs to do business.
Arsene Wenger's side has three points from two Premier League games.
Jesé, Stoke's new signing, scored during his debut, but Arsenal's best players didn't perform—as the police Twitter account pointed out.
United has won its first two league games of the season.