Arsene Wenger admits his back three formation may just be a short term fix
But the under fire boss says three at the back may not be his long-term solution.
Arsenal have struggled in recent weeks with defeat against Crystal Palace last Monday heaping the pressure on Wenger and his players.
Arsene Wenger's side got back to winning ways against Middlesbrough last night
But with the injuries and a desperate need to change things Wenger gambled on something different.
"I don't know, I just felt that sometimes the team needs to believe in something new, something different, just to find a bit of confidence back," Wenger said.
Arsenal player ratings against Middlesbrough Mon, April 17, 2017
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Petr Cech – 7: Made a crucial save when the defence failed him
"Overall I felt that it worked quite well because we won the game.
"We had practiced on it before at some stage, (but) we like offensive football so this was a bit more defensive-minded for us.
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"I feel overall it is not a long-term plan, but punctually it can work."