The 21-year-old has nine goals from 16 appearances, but could find himself back on the bench tomorrow as Wenger looks to keep players fresh during a busy period.
"It was nice to get in the starting line up and show the boss what I can do. Hopefully I can stay there now. I just have to play well when I can," said Walcott.
"I know it's going to be a tough period, there's going to be chops and changes, I know that because it's very busy.
"There's a lot of games, you don't want to put too much work on yourself. I'm sure there will be a lot of changes on Wednesday but I feel fit, I'm ready to go.
"I have been practising my crossing and finishing when I can after training - when they let me because I don't want to kill myself.
"It's just something I have worked on and hopefully it can continue because I have missed a lot of the season so far.
"I have got nine goals and I'm pleased with that and hopefully that can continue."