Campbell, 21, is on loan at Olympiakos and scored a wonder-goal in the Champions League to down Manchester United on Tuesday night.
"I do nothing more than focus on playing for the team, whether Olympiakos, whether in Real Betis, whether in Orien," Campbell said.
"For me it has been an experience that has made me grow as a player. It's not the time to say whether I will play at Arsenal or not.
"But, if I get that chance to play there, I will do as I have always done in my life, fight and believe in myself.
"I know I have the qualities to be where I want but I have to improve a lot. I have to work day by day so I can be there."
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