Arsenal travel to Sutton United for their FA Cup fifth-round tie on Monday night as manager Arsene Wenger seeks to win the trophy for a third time in four years.
The Gunners are already all-but out of the Premier League title race and exited the EFL Cup in the early rounds.
They must overcome Bayern Munich to make the Champions League last-16, meaning the FA Cup is now their best chance for silverware.
It's a banana skin of a game, a classic cup tie
Sutton beat Leeds United 1-0 in the last round to secure this home fixture against the Premier League giants.
And former Gunners defender Martin Keown expects the non-league side to put up a fight.
"(Arsenal) have got to make sure (they don't lose)," Keown told talkSPORT.
"I've been down there and had a look at (the pitch).
Sutton United host Arsenal next Monday
Sutton United beat Leeds to make the FA Cup fifth round
Arsenal face Bayern Munich in the Champions League before heading to Sutton next week
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"You look at (Wenger's) record in the FA Cup, the best there's ever been.
"He needs to make sure (his side) doesn't clash with the Champions League.
"It's a banana skin of a game, a classic cup tie.
"Sutton have done incredibly well to get there. Everyone is there for a cup upset."