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Swansea midfielder Nathan Dyer opened the scoring in the first half

Swansea recorded their first ever win over Everton to reach the fourth round of the Capital One Cup.

The Welsh side took the lead in the first half when Nathan Dyer poked in after excellent work by Jefferson Montero down the left.

Gylfi Sigurdsson tapped in the second after Jonjo Shelvey's delivery was inadvertently headed on to the bar by Everton's Sylvain Distin.

Substitute Marvin Emnes drilled in an brilliant third late in the game.

Monk salutes 'professional' Swansea

This latest defeat means the Toffees have only managed two wins in all competitions so far this season, although perhaps more worryingly for manager Roberto Martinez, his team have only managed one clean sheet.

The Spaniard described his team's defensive travails as "spooky". external-link After the full-time whistle the rain-drenched backline had a haunted look.

A major problem was down Swansea's left. Full-back Tony Hibbert, playing in a club record equalling 15th season, was often left treading water by winger Montero.

It was on one of those forays that led to the first Swans goal when the Ecuador international got past his marker before firing in a low ball that found its way to Dyer at the far post.

Match facts This was the first League Cup meeting between the sides. The Toffees have been knocked out in the third round in four of the last five seasons. Swansea had never beaten Everton on the previous 20 occasions - losing 15 and drawing five. The Swans have gone further than the third round three times in the past six seasons.

The second goal came as a result of a far bigger error from another one of Everton's experienced defenders. On this occasion, Distin lost his bearings when he headed Shelvey's delivery on to his own bar.

The Frenchman was punished for his misjudgement when Sigurdsson raced in to guide the loose ball past Everton keeper Tim Howard.

Everton had brought on their record signing Romelu Lukaku at half-time to bring some bite into the attack, but his only clear-cut chance was smothered by Gerhard Tremmel, who raced out to prevent the Belgian from shooting.

It was another substitute on the night who scored the third and final goal.

Emnes, who signed a permanent deal with the Swans in the summer, showed great pace and precision when he raced onto a through-ball before finding the corner with a firm drive.

Swansea manager Garry Monk: "It was very professional. We played a very good team in Everton.

"We started well and created quite a few good chances. We took the goals very well.

"Everyone knows how we've done in the cup in recent history. It's an important competition to the fans."

Everton manager Roberto Martinez: "The game went down to whoever was going to take their chances.

"If we had scored the first goal it would have been completely different.

"The scoreline reflects that Swansea were very clinical and we weren't and that is the reason why we are not in the competition.

"I feel Swansea deserve to go through as they had spells when they looked sharp and were good technically, but I don't think it was a performance which reflected a 3-0 difference."

Swansea striker Wilfried Bony was suspended for the match - but took his place as a spectator in the stands

Everton's Bryan Oviedo started his first senior match since breaking his leg at the start of the year

Nathan Dyer (second left) set Swansea on their way to their first ever win over Everton