Britain Football Soccer - Barnsley v Everton - Pre Season Friendly - Oakwell - 23/7/16 Everton manager Ronald Koeman before the match Action Images via Reuters / Peter Cziborra Livepic

By Will Butcher

Ronald Koeman has bemoaned Everton’s lack of concentration from set pieces after their 3-2 loss to Watford on Saturday.

The Toffees had gone 1-0 ahead thanks to a calm finish from close range from Romelu Lukaku, after Gareth Barry had played him through with a superb assist.

Posting on his personal Twitter account, describing the loss at Vicarage Road as “really frustrating” after conceding two of the Hornets’ three goals from dead-ball situations.

Stefano Okaka scored a double for Walter Mazzarri’s side, flicking in a cross from Nordin Amrabat for his first with Ashley Williams nowhere to be seen.

Austria international Sebastian Prodl was given the freedom of the Toffees box for Watford’s second as he headed in a free kick, before Okaka got a second of his own and Watford’s third from a corner.

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Former Chelsea striker Lukaku grabbed his second late which saw a frantic late Everton onslaught, but it was not enough for Koeman’s side.

The Dutchman was visibly frustrated on the touchline for the Toffees towards the end of Saturday’s lunchtime kick-off, as pressure continues to grow on the former Southampton boss.

The blue half of Merseyside are enduring a dismal run of form that has seen them win just once in 11 league and cup fixtures.

Everton will be hoping to put the record right against Arsenal on Tuesday night, as they play host to Arsene Wenger’s side at Goodison Park.

In other Everton news, here are three things we learned from Everton against Watford.