Brentford forward Dango Ouattara fluffed a Panenka-style penalty as West Ham United reached the FA Cup quarterfinals for the first time in a decade with a 5-3 shoot-out win.

The Burkina Faso international's outlandish attempt was easily caught by Hammers goalkeeper Alphonse Areola before Konstantinos Mavropanos converted the decisive spot-kick.

Hammers captain Jarrod Bowen and Brentford top scorer Igor Thiago each scored twice during normal time as an entertaining fifth-round tie ended in a 2-2 draw.

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Three-time FA Cup winners West Ham will host Leeds in the last eight, having last progressed to that stage of the competition during the 2015-16 season -- their final one at Upton Park.

England forward Bowen poked the hosts into a 19th-minute lead in an action-packed first half before Thiago levelled for the Bees with his 20th goal of the season.

Bowen doubled his tally with a 34th-minute penalty, only for Thiago to force extra-time by converting from the spot in the 81st minute.

Ouattara was the only player to fail in the shoot-out as Brentford's wait for a first quarter-final since 1989 was extended in agonising fashion.