Man City's five-man leadership group have decided on the new rule.
Gallagher helped Chelsea to a 2-0 win over Tottenham at Stamford Bridge.
Mourinho has been without a role since being sacked by Roma in January.
Benzema has struggled since joining Al Ittihad on a free transfer from Real Madrid last summer.
Sancho impressed as Borussia Dortmund beat PSG 1-0 in the Champions League.
Sancho impressed as Dortmund beat PSG in the Champions League.
Liverpool have unveiled their new kit for next season.
The fight rules for Mike Tyson vs Jake Paul have been announced.
Wrexham could have one of the biggest stadiums in the UK.
Arne Slot could be set to reunite with the player at Liverpool.
He only joined Liverpool last summer.
He had the chance to play with Lionel Messi, Xavi and Andres Iniesta.
Jamie Vardy is out of contract with Leicester at the end of the season.
The rules for Mike Tyson's fight with Jake Paul on July 20 have finally been announced.
Terry played under Mourinho during the Portuguese's time at Chelsea.