Arsenal could move to within a point of Tottenham Hotspur or end the day with their top four hopes down the drain.
The Gunners have lost three successive Premier League games and host a Brighton and Hove Albion side which has nothing to play for following confirmation of Cardiff City's relegation to the Championship.
However, Unai Emery's side do go into the game at the Emirates Stadium on the back of a fine 3-1 win over Valencia in the first-leg of their Europa League semi-final showdown.
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That result would be enough to take this exciting - yet strange - top four battle into the final weekend of the Premier League season where Arsenal could yet claim bragging rights in the capital.
For that top happen they must beat Brighton as well as Burnley and then hope for a favour from Watford and Leicester City against Chelsea and the same from Everton against the Lilywhites.
In many ways, this is a huge week for Emery as Gunners head coach and all the focus is on getting three points against the Seagulls.
The Gunners were put through their paces at London Colney on Saturday ahead of the 4.30pm kick-off this afternoon.
Youngster Eddie Nketiah was present as was the likes of Alexandre Lacazette, Pierre-Emerick Aubameyang, Matteo Guendouzi, Mohamed Elneny, Granit Xhaka, Mesut Ozil, Stephan Lichtsteiner and club captain Laurent Koscielny.
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