Arsenal's new shotstopper Petr Cech said he clashed with Chelsea boss Jose Mourinho over his decision to move from Stamford Bridge to the Emirates.
The Czech international sealed his move to the north London side on Monday, following a £10m agreement between the Blues and the Gunners.
“I think it has been great to have a chat with Jose because he is a manager that I have worked with for the longest time in my career,” Cech said.
“He had to make his decision at the start of last season, I had to make my decision at the start of this season.
“But I will always keep the best regards for him because I believe that we had so much success and so much respect for each other.
"He is one of the best managers in the world. Now, we will be opponents but it will not change our relationship, I believe.
“You know, I learned a lot from him and one of those things was that if you have to make a hard decision, you need to make sure that you do it if you believe it is the right choice.
“He made his decision, I had to make my decision and obviously we’re now in this situation.
“I have a huge respect for him and we had a good chat about it.
“Obviously I know he would have loved me to stay, but that’s the way it goes.
“Last season I realised that I am not in the phase of my career that I would be happy to be a back-up goalie and sit on the bench,” Cech, 33, added.
“I believe that in all those games I played I showed that I still have the skills and the level required to play as a No.1 goalkeeper in the best league in the world.
“We always said that if I had the permission from the club and from the owner to stay in the Premier League that I would consider every offer.”