Petr Cech has highlighted Arsenal's inconsistency as their major problem
The Chile international scored a controversial first which he appeared to handle and then grabbed a second from the penalty spot in added time.
And Petr Cech has claimed if the Gunners are to secure a top-four finish and Champions League football this season then they must be more consistent.
Arsenal beat Hull 2-0 with two goals from Alexis Sanchez
"There are not many games left to be played," Cech told Sky Sports News.
"Though Chelsea have a big advantage, all we can do is make sure we keep winning our games.
"The table is very congested in the race for the Champions League positions, so this win is exactly what we needed.
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Sat, February 11, 2017
Express Sport brings you 10 key statistics from Arsenal's 2-0 win over Hull City at the Emirates
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Express Sport brings you 10 key statistics from Arsenal's win over Hull
"We need to be consistent, because we do have periods where we do well then other weeks when we lose games.
"We need to improve where we can improve and ensure we are ready for every game, because now every game will be like a final."
Arsenal currently sit in third place in the table following the 2-0 win over Hull – nine points of league leaders Chelsea who have a game in hand.