Walcott is expected to make their clash with Southampton.
"Of course you miss a player like Theo Walcott," he said.
"Strikers who get behind the defenders have a very important quality and Theo [Walcott] has that quality. Theo had a good start to the season, he scored goals, he provided chances and had assists.
"He can always give you a different option in the game and that is of course vital.'
For breaking stories and all the great banter like us on Facebook: facebook.com/tribalfootball