Arsenal will again be without Croatia striker Eduardo (hamstring) for the visit of Liverpool.
Fit-again Denmark forward Nicklas Bendtner is pressing for a start after coming off the bench in the 2-0 defeat at Chelsea.
Robin van Persie (ankle), Kieran Gibbs (foot), and Johan Djourou (knee) are long-term absentees.
Arsenal's main weakness appears to be in defence as they have shipped 30 goals in the Premier League this season - 10 more than rivals Chelsea and Manchester United.
While recent lapses in concentration at the back and non-existent marking have cost the Gunners heavily, Wenger maintains the errors are simple to fix.
He said: "It is important that I show support to my players and think collectively about how we cannot repeat the mistakes which happened to us in the last two games.
"Having looked at the way we have conceded the last two goals, it looks to me quite easy to solve, and that is it.
"It is important that we support each other and show solidarity and that people who try to destroy that are not right."
Wenger added: "This is a team that really wants to win and you have seen that against Chelsea, until the last minute of the game."
Midfielder Alberto Aquilani will miss Liverpool's trip because of illness.
The Italian has been vomiting and manager Rafael Benitez said he was too weak to feature at the Emirates Stadium.
Centre-back Sotirios Kyrgiakos starts a three-match suspension after being sent off in Saturday's fiery Merseyside derby and is also sidelined for forthcoming games against Manchester City and Blackburn.
He is likely to be replaced by Martin Skrtel, who was dropped to the bench at the weekend to allow for the return of Daniel Agger after a month out injured.
Liverpool's only other absentees are striker Fernando Torres (knee), Yossi Benayoun (rib) and Glen Johnson (knee), all of whom are still some way off full fitness.
A victory at Arsenal - where they have not won in the league for a decade - would put Liverpool within two points of their third-placed opponents.
And Gerrard believes they would not let that slip.
"I'm sure Arsenal will be a bit of a wounded animal on Wednesday," he added.
"It's a massive game for us and the target is to try to get a result where we can push on and try to get third place.
"Our target is a top-four finish but if Arsenal give us any sniff of catching them then we want to grab it, and hopefully that will be on Wednesday night."
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