By Chris Harris

Theo Walcott hopes his impact on Wednesday night's Champions League game has given Arsène Wenger a selection headache ahead of the trip to Manchester United.

The 21-year-old came off the bench to give Arsenal much-needed impetus against Partizan Belgrade. Walcott's runs in behind the Serbian defence gave the visitors a big problem and he was quick to volley home a vital second goal in the 3-1 victory.

Marouane Chamakh, Samir Nasri and Andrey Arshavin have been Wenger's preferred front three for much of this season but Walcott believes his impressive return of eight goals in 14 appearances could earn him a place in the starting line-up at Old Trafford on Monday.

"It’s always frustrating being on the bench," he said. "You can ask any player, it’s just as frustrating as being injured - for example Kieran Gibbs has sprained his ankle so that’s unlucky for him.

"It comes to a point where you don’t want to dwell on it [being a sub] all the time and you just want to come off the bench, show what you can do and get back into the team.

"This season I’ve come back and the team’s been doing well so it’s been difficult to get back into the team because there’s no need to change it. Which is understandable but it’s frustrating as well. Hopefully I've shown the boss what I can do."

Copyright 2014 The Arsenal Football Club plc. Permission to use quotations from this article is granted subject to appropriate credit being given to www.arsenal.com as the source 9 Dec 2010