The Spain international has impressed for the Blues after moving from Barcelona to Stamford Bridge for a reported £28m.
Prior to his three-year stint at Camp Nou, Fabregas represented Arsenal for eight years and eventually took the captain's armband in Arsene Wenger's side.
"I will always have the feeling of being a Gunner," the Daily Star quotes Fabregas as saying. "I know when I go back to play at the Emirates it will be a special moment, but I am a committed guy.
"I remember playing for Arsenal against Barcelona in a Champions League final, and swearing that I'd do anything to win that game, despite having been with Barca since I was a kid.
"So when the Arsenal game comes around I will know who I'm playing for, who my teammates are and who I have to defend against. I know that the Arsenal fans will understand me. I have no doubts."
Fabregas will face his former club for the first time this season at Stamford Bridge on October 5.