The winger thinks his side have improved as a unit on last year, and is now focused on finishing the season positively.
The forward came off the bench to play a big part in Arsenal’s equaliser at Old Trafford on Sunday, earning his side a point in the process.
The trip to Manchester was Arsenal’s third of the season and they’ve came back undefeated each time. Walcott says the unity in the squad was crucial to not only their comeback in the game, but their strength in the bigger matches throughout the season.
“This year has been a massive change in the whole team from the defence all the way through,” he said.
“We’ve managed to be a lot more of a unit as well and that’s helped in the big games at times. Maybe we’ve gone for it too often [in the past] but we were picking the right times to go and it worked here.”
The Gunners have had an impressive 2015 after a poor start to the season, with the World Cup having a noticeable effect on not just their pre-season preparations but several of their first choice players as well.
However, that strong second half of the season has seen them look to secure third place in the Premier League and avoid a Champions League play-off, with many saying the right signings in the summer could see them challenging for the title come next season.
For now though, Walcott is focused on the last three games of the season, saying it was vital they didn’t leave Old Trafford as losers.
“It was important not to lose the game,” he added.
“It’s such a fantastic arena to play in, our fans were fantastic and we’re going to go into the last three games very positive.”