With star strikers Robin van Persie and Nicklas Bendtner already sidelined, news of players coming back to fitness is good for Gunners boss Arsene Wenger although he will be without Samir Nasri and Aaron Ramsey for up to three weeks.
"They (Walcott and Denilson) are available for Wednesday night. It is a big boost to have them back of course because they were out for a while and it gives us some fresh players as well and it's very good," Wenger told Arsenal TV Online.
"He (Walcott) was unlucky with some small niggling injuries and now it is good to have him back.
"Samir Nasri and Ramsey are both out for 21 days," the Frenchman continued. "Let's say we can have a good surprise with both because they are usually quick recovering players but our common sense tells us 21 days."