The window reopens for a month at the beginning of the new year.
The German playmaker's contract expires at the end of the season.
The Portuguese coach's agent has reportedly been speaking to another club.
The club has a few players with contracts expiring at the end of the season.
Chelsea beat Manchester United 1-0 on Sunday but the Brazilian watched from the stands.
Jose Mourinho returned to the stadium where he won three Premier League titles.
Arsene Wenger has wanted the French midfielder since last season.
The Manchester United manager is already considering the signings he wants to make in January.
Zinedine Zidane's Real Madrid travel to London on Wednesday for the Champions League clash at Wembley.
Arsenal travels to the Etihad Stadium, where Alexis Sanchez may wish he'd moved to.
Manchester United may have had a good start to the season, but life isn't all sunshine and rainbows at Old Trafford.
The French midfielder has been sidelined for six weeks with a hamstring injury.
Both Premier League clubs are planning to bolster their squads in January.
Many names have been mentioned for the hot seat at Goodison Park, so who can save Everton?
The Frenchman only signed a new contract at the club five months ago.
Thibaut Courtois and his teammates will "fight" for Antonio Conte the same way they did for José Mourinho in 2015, the goalkeeper says.
Tottenham travels to Old Trafford on Saturday with the chance to overtake Manchester United in the Premier League.
The Lakers legend looks like he's picked a London team to follow.
Jose Mourinho saw his team fall to five points behind Pep Guardiola's Manchester City over the weekend.
"I think the whole game, pretty much the whole result was our fault," a shell-shocked Jurgen Klopp said after being beaten 4-1.
The Arsenal playmaker has been linked with a move to Manchester United.