Chelsea midfielder Cesc Fabregas knows it will not be easy to face his old club when the Gunners play Chelsea on October 5.
Arsenal had a clause to buy back their former captain but manager Arsene Wenger turned down the option, saying the midfielder would struggle to secure a place in the team.
The Spain international left Arsenal in the summer of 2011 and never expected to make a comeback in the English Premier League in a non-Arsenal jersey.
"Don't think I didn't think about it," Fabregas told El Pais.
"I will keep the Gunner feeling forever and I know that I will return to Highbury [Emirates Stadium] and it will be a special moment, but I am a committed guy.
"I remind you that I played the Champions League final against Barcelona [with Arsenal] and I swear I would have done anything to win that game - and I have been a Barcelona fan since I was a kid."
His love for Arsenal may still be intact but the Spaniard knows exactly what he will do when the game kicks off.
"So I know that when I play against Arsenal I will know who is my [current] team, who are my colleagues and who I defend," added Fabregas.
"And I know that the Arsenal fans will understand me, I have no doubt.
"If you'd told me five years ago that I would play for Chelsea and Mourinho I would not have believed you, but life changes."
