Petr Cech wants Arsenal to build on their two-goal lead against Valencia but remains wary of defensive complacency ahead of the semi-final second leg on Thursday.
Cech, who will retire at the end of the season has featured more in the Europa League and could wrap up the campaign with the title if they overcome Valencia at the Mestalla to reach the final.
The 36-year-old goalkeeper has however warned the team not to be complacent despite their 3-1 lead from the first leg at the Emirates.
Arsenal’s record away from home has been disturbing with their only win in the knockout phases coming against Napoli.
“Over the course of this campaign we were in this position a few times,” Cech said via Sky.
“We lost the first round away at BATE Borisov so the home game could have been the last game in Europe.
“Then we lost away in France so the return leg against Rennes was the same thing.
“With Napoli, we won at home but we respected the opponent going to Italy. We knew it was going to be difficult and it could potentially be the last game in Europe for me.
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“Tomorrow is exactly the same situation. We have given ourselves a two-goal cushion… it is an advantage but it is not a decisive advantage.”
Cech has previously won the Europa League with Chelsea and may likely face his former employers in the final if they eliminate Frankfurt in the other tie.