The 24-year old forward played the final 20 minutes of the Gunners' 2-0 home win over his former club Southampton following an abdominal injury and now he is striving to force his way back into Arsene Wenger's starting line-up.
"It is a challenge I can face, I have faced some in my short career so far," said Walcott.
"It is nothing new to me, I know how to deal with it all. I have some fantastic people around me and know how good I am.
"It will take a couple of games, but I am sure I will be back to my best very soon."
He added: "It is frustrating at times, but you have just got to think about getting back fit as soon as you can, and I am happy to be back now."
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