And Cech has conceded the Gunners face a huge battle to secure Champions League football for next season.
Arsenal 2-0 Hull: 10 key statistics from the match
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
Petr Cech has admitted Arsenal's top four hopes are hanging in the balance
Alexis Sanchez scored twice as Arsenal beat Hull on Saturday
"They have a big advantage, Chelsea, so we need to keep winning our games," he told the Gunners’ official website.
"And obviously not only looking ahead but we need to look behind as well because for the Champions League positions the table is very congested."
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Cech's admission that the Gunners are nervously looking over their shoulder will no doubt worry Arsenal fans.
Manchester United are hot on Arsenal's trail
The north London giants have often been accused of being mentally weak in recent years with the club still waiting to win the title for the first time since 2004.
Just two points separate teams in second and sixth respectively.