By Danny Gallagher For Mailonline
Published: 23:29 BST, 2 May 2019 | Updated: 23:46 BST, 2 May 2019
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On an evening in which Arsenal put one foot into the final of the Europa League, niggling concerns regarding set-piece play began to play on the minds of players and club legends.
The Gunners overturned an early goal to chalk up a 3-1 first-leg lead against Spanish opposition Valencia in the semi-final stage of the competition.
Mouctar Diakhaby towered above the Arsenal back line just 11 minutes into the tie, out-jumping three opponents to nod home from close range and expose a frailty which has been lingering for some time.
Martin Keown had warned that Arsenal could be susceptible to concede from dead-balls
Keown questioned whether a mix up with Steve Bould (centre) and other coaches is to blame
Alexandre Lacazette hit a brace to help Unai Emery's side stage a convincing comeback, but admitted afterwards his side must start
