Arsenal know it is Baku or bust for their hopes of qualifying for next year's Champions League.
The Gunners have to win the Europa League if they are to return to European football's top table.
But they still have a job to do if they want to make it to Azerbaijan for the final as a second leg against Valencia awaits.
Arsenal have a 3-1 lead as they head to Spain, but conceding early, because of their awful recent form, could make for a nerve-wracking evening.
The action can be watched for free with a simple hack - here is how you can watch on...
How can I watch it on TV?
Valencia vs Arsenal will be broadcast live on BT Sport 2, with coverage from 7:15pm BST.
The game is shown on BT TV channel 409 or in HD on 431.
The channel is number 528 for Virgin Media customers.
And Sky subscribers can find it on channel 414 for HD coverage, or 868 for non-HD.
How can I stream Valencia vs Arsenal?
If you are a BT Sport subscriber, you can live stream this crucial second leg fixture online on btsport.com , or alternatively on the BT Sport app on tablet or mobile devices.
You can also follow the latest action via Mirror Football’s live blog.
Can I watch it for free?
An EE phone plan will allow customers to catch all the action for FREE by signing up for a three-month trial.
You can text SPORT to 150 and follow the instructions, with the trail allowing you to watch all of the BT Sport channels via their app.
Casting to your television is also included, and the trial can be cancelled at any time by texting STOP SPORT to 150.
At the end of the trial, the services will cost £5 per month for the app and £10 per month for casting.
