Keown’s BT Sport colleague John Hartson likewise believes Emery’s situation has reached a critical point.
He said: “Frankfurt were so poor in the first half – they never mustered one shot on target. To have lost tonight to that side…
“There was no urgency in the Arsenal performance, very lacklustre, it looked like they had no direction from the manager in terms of how they were going to play.
“They were a goal down, they bring on [Lucas] Torreira – a defensive midfielder – when you’ve got Pepe and Lacazette on the bench.
“I want to see [Pierre-Emerick] Aubameyang play down the middle. You’re 2-1 down, he’s staying on the right hand side when he’s a centre forward and the one who’s going to get you a goal.
“All in all, very disappointing and on the back of that performance, Unai Emery… They’ve got be starting to ask serious questions of his job now. They really have.”
Arsenal’s next match pits them against Norwich City on Sunday, though the Canaries are buoyed from a win over Everton at Goodison Park last weekend.
Arsenal, also, haven’t won an away match in any competition September 19 and only two all season.