Theo Walcott has urged Arsenal to get Tuesday night's defeat out of their system in time for this weekend's return to domestic affairs.

Arsène Wenger's side were beaten 3-1 by Bayern Munich in the first leg of their Champions League last-16 tie at Emirates Stadium and are now rank outsiders to advance to the quarter-finals.

The Arsenal manager admitted that it could be an "easier battle" to qualify for next year's Champions League than stay in this season's competition, but Walcott knows that depends on getting the right results in the weeks to come, starting against Aston Villa on Saturday.

That Tottenham game [on March 3] could be a massive game for us. And we need to win against Aston Villa first

Theo Walcott

"We need to try and not dwell on this result," Walcott told Arsenal Player. "We need to think about getting back to the Premier League. We’ve got some important matches coming up thick and fast.

"That Tottenham game [on March 3] could be a massive game for us. And we need to win against Aston Villa first.

"Our Premier League form has been very good so we can’t dwell on this result for too long. We need to get back to where we should be and start getting a winning run at home."

Not that Walcott is giving up the ghost in the Champions League - understandable given that Arsenal beat AC Milan 3-0 in the second leg of last season's corresponding tie.

"When we go there [to Munich], we have to be very positive and just go right at them," said Walcott.

"Last season we beat AC Milan when we lost 4-0 in the first leg. We did very well at home here. We’ve got to show what we can do when we go away and play without any fear and have nothing to lose. It’s a big ask but we need to be positive."

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 Chris Harris 20 Feb 2013