The Portuguese boss arrived at Stamford Bridge on the back of making Porto Champions League winners, just 12 months after he guided the club to UEFA Cup success against Celtic in Seville.
With Sir Alex Ferguson and Arsene Wenger dominating the Premier League, Mourinho cut a fresh-looking figure and he announced himself to the British press by proclaiming that he was the ‘Special One’ in his first press conference as Chelsea boss.
Mourinho was already renowned for his cutting edge training sessions and he made a mark for himself in England with fast starts in the Premier League.
Much of that was down to the brutal pre-seasons that Mourinho designed for his squad and Terry has revealed he was dreading the Portuguese’s arrival because he knew how tough it would be.
Asked what his thoughts were when Chelsea appointed Mourinho, Terry told BeIN Sports: ‘Nerve-racking and I was petrified. We’d all seen the ‘Special One’ interview. He’d just won the Champions League with Porto.
‘As a group of players we were texting each other saying ‘oh no, this’ll be tough this’ but from day one he blew us away with his sessions.
‘Like all of us you go in [to training with a new manager] and say ‘Okay, lets see what the manager’s got’ because it’s down to them to impress the players and he certainly did that from day one.
‘He did that on a personal basis, on the training field and he was special that’s for sure.’
Terry won the Premier League twice with Mourinho in his first three years at the club and won it for a fourth time under the Portuguese when he returned in 2013.
The former England captain is now assistant manager at Aston Villa and has admitted it’s his dream to manage the Blues.