The 25-year-old, who swept the board in the player of the year awards as Chelsea won the Premier League title last season, failed to replicate his stunning form this time around as Mourinho's men floundered in the early part of the season.
Hazard's limp displays were matched by key players all over the pitch and Mourinho paid the price in early December after being fired by Roman Abrahamovic.
And the midfielder, who has yet to score in the Premier League this season, admits to feeling guilty.
"I sent him the message to say I was sorry he had gone and ..
well ..
just that I was sorry," he told the Guardian
"We'd enjoyed all that success together last season, but this time round we hadn't
"I felt a little bit guilty because I'd been player of the year
I'd been one of the most decisive players, and this year I'd performed less well
"I hadn't been at the same level
So I sent that text to José and he came back to me, wishing me all the best for the future.
"For a team of champions to go through what we have this year even I can't explain
Things have been better recently, but we're still not winning games quite as we used to
No one can put his finger on what's happened at Chelsea."
Source : PA
Source: PA