Alessandro Proto, an Italian businessman, claims to have met with Chelsea owner Roman Abramovich in London for talks about Mourinho’s availability.
"We offered €50 million to have the coach immediately, but the request was €100m and that figure seems exaggerated," Proto Enterprises said in a statement to EFE.
The press release also claims that the offer was rejected because Mourinho was classed as “the best coach in the world” by Abramovich.
Mourinho is under pressure to deliver results after Saturday’s defeat to Liverpool at Stamford Bridge - their eighth in all competitions this season - left the club 15th in the Premier League.
"I have four years. In this case, three years and seven months,” said the Chelsea manager on Tuesday.
"Yes, I know why the results have been different but I can’t tell you because I’ll be here a long time. It’s a combination of factors. Some of them I can’t, I don’t even want to touch them — but yes I know."