Terry has spent every day this week at Wembley fighting the Football Association charge of using racist language towards Anton Ferdinand.
But that did not prevent
Provided Terry does not begin a suspension during Saturday's trip to the Emirates Stadium - something that is possible if he is found guilty in his hearing and elects not to appeal - he could go into the game with very little training time this week alongside his team-mates.
But Chelsea assistant manager Eddie Newton said: "He's been fine, dealing with the situation at hand, coming in and doing what he has to do at the club.
"We've been talking to him, Robbie's been talking to him, and he's been very positive and upbeat."
He added: "The fact is he's got a lot of minutes under his belt already. There are ways and means around it when it comes to training, after what he does at the FA.
"We'll work out scenarios and we'll be in constant contact with John, the fitness coaches and medical staff will get around him and make sure he's prepared in the best way possible, as we always do."
Newton admitted the final decision to play Terry last night had only been taken yesterday afternoon but that it had always been Di Matteo's intention to do so.
He said: "We wanted John to start. Obviously, with everything happening with the FA, we had to see how it panned out.
"We had a phone call he was making his way back from the FA nice and early so it wasn't last-minute-dot-com. We'd covered all the bases, all the scenarios, and the best one happened."
Asked if Terry played last night to prove a point, Newton said: "Knowing John, he's a positive person who loves the club.
"He's very enthusiastic about playing, just as he was as a young man. He just wants to play."
Gary Cahill, Ryan Bertrand, Juan Mata, Oriol Romeu, Fernando Torres and Victor Moses scored the goals in Chelsea's win last night, which also saw impressive performances from a number of debutants, including Cesar Azpilicueta and Lucas Piazon.
How many of them played their way into the frame for Arsenal could depend on the fitness of Daniel Sturridge (hamstring) and Frank Lampard (ankle), both of whom sat out last night's game. Newton rated the former as "50-50" but was less certain of the latter