Di Matteo said he had no concerns over Terry's mental wellbeing because he was just as strong as Del Piero, who jets into Sydney on Sunday to start his two-year stint with Sydney FC after a 19-year career with Juventus.
Terry faces the latest trial by fire of his controversial career when he returns to Loftus Road for the first time since being acquitted of racially abusing Rangers defender
Blues captain Terry, who is still contesting a
On top of that, he is likely to be taunted mercilessly by Rangers supporters, something which happened on his last visit there in January.
"But, if you look at his career, he's always got on with it. He's a confident player.
"I played with some great players in my career. There were certain players who were very, very confident."
He added: "To be able to survive for so many years at the top level in football, at club and international level, you need to be mentally strong.
"That goes for all the players who have had that kind of career, not just JT."
Terry's desperation to play has been compared to that ahead of January's FA Cup fourth-round tie at Loftus Road, which saw him aggravate a knee injury, sidelining him for several weeks.
There is a sense of deja vu about the Barclays Premier League clash, with Terry coming into the game having only just shaken off an ankle problem.
"My assessment is on the fact that if the medical department tells me a player is fine, he's available to be selected. You never know what happens in the game.
"I don't think there are any concerns that he aggravates anything."
It seems certain Terry will start.
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