"Everyone is different and they get results in different ways."
Docherty also believes Grant should take credit for maintaining the standards set by Mourinho.
He said: "Inheriting a squad is one thing. Keeping it up to the standard required is another thing.
"He made one or two bad signings but I don't know whether he made them or the club made them."
Guus Hiddink is the favourite to replace Grant, and Docherty is convinced the Dutch coach has already been lined up by Russian owner Roman Abramovich.
"I think Guus Hiddink is the next manager of Chelsea," he said.
"Because he's in charge of the Russian national team and the moment.
"I think he's just keeping warm for the Chelsea job."
"Everyone is different and they get results in different ways."
Docherty also believes Grant should take credit for maintaining the standards set by Mourinho.
He said: "Inheriting a squad is one thing. Keeping it up to the standard required is another thing.
"He made one or two bad signings but I don't know whether he made them or the club made them."
Guus Hiddink is the favourite to replace Grant, and Docherty is convinced the Dutch coach has already been lined up by Russian owner Roman Abramovich.
"I think Guus Hiddink is the next manager of Chelsea," he said.
"Because he's in charge of the Russian national team and the moment.
"I think he's just keeping warm for the Chelsea job."