Mikael Silvestre says he does not want to dwell on the reasons for his Arsenal departure.
Silvestre, 33, left Arsenal on a free transfer this summer along with Sol Campbell and William Gallas and has since joined Bundesliga side Werder Bremen, and he says he just wants to focus on doing well for his new side.
"There must be a reason why Sol Campbell, William Gallas and myself all left the club, but it's not the place to discuss that," he said. "I'm just happy for Arsenal to continue the way they do.
"I still watch their results and some highlights because I care about my (former) team-mates and the staff. I had a good time over there, so I'm not going to complain. Now I'm focusing on Werder 100%."
Silvestre will face Gallas when Werder take on Tottenham in the Champions League on Tuesday, and he is convinced his former team-mate will succeed with Arsenal's arch-rivals.
"I don't know if I would've taken that decision (to join Spurs) but, when there was speculation about William joining Tottenham, I was almost sure that he was going to sign," he said. "William does not listen to anybody else but himself - and that's his choice.
"If you ask me if he made the right decision, I would say - for him - yes, because he's happy, he's playing, he's in London, his family are there.
"I think William can give a lot to Tottenham with his experience in that competition and at international level. I'm sure that he will bring a lot because he's a warrior and he's going to show the way to the Tottenham defence and the whole team."