The Cottagers are hovering above the relegation places at the foot of the Barclays Premier League without a win in their last six outings.
But Gera believes that a win over Sunderland will help boost their confidence and ease their fears of being drawn into a battle at the bottom.
The midfielder insists they must carry on from their performance against Arsenal which saw them beaten by two stunning goals from Samir Nasri.
"We have to build on this performance and, if we keep playing like we did, we will start to pick up more points," said Gera.
"We were unlucky but Samir Nasri scored two fantastic goals. We created chances and were aggressive. The Sunderland game is massive for us, especially as we are at home. We need the three points. Hopefully we will play well like we did against Arsenal."
Source: PA