The heroics of Rooney and De Gea was not enough as Manchester United were outclassed by Athletic Bilbao in their own backyard, losing 3-2 to the visitors in their Europa League round of sixteen first leg clash.

Although Manchester United took an early lead in the 22nd minute via a goal from Rooney, the visitors, after attacking continuously, soon found an equaliser through Spanish striker Fernando Llorente in the dying minutes of the first half.

The second half was dominated by the Spaniards, who finally took the lead in the 72nd minute through their 22-year-old Spanish forward Oscar de Marcos.

United's fate was sealed when Muniain, Athletic's top scorer this season, managed to net the ball past De Gea, who had just saved another Oscar shot.

United's hopes were briefly lifted when Rooney found the back of Athletic net via a penalty in added time, but the Spaniards managed to cling on to their one goal lead.

Check out these pictures capturing the two teams in action:

Also check out this video capturing all the goals of the game:

Manchester United Vs Athletic Bilbao 2-3, 2012... by red_wing_21

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Athletic Bilbao's Iturraspe challenges Manchester United's Park during their Europa League soccer match in Manchester.Reuters
Athletic Bilbao's Iturraspe challenges Manchester United's Evra during their Europa League soccer match in Manchester.Reuters
Manchester United's Smalling walks off injured during their Europa League soccer match against Athletic Bilbao in Manchester.Reuters
Athletic Bilbao's Susaeta challenges Manchester United's Evra during their Europa League soccer match in Manchester.Reuters
Athletic Bilbao's Susaeta challenges Manchester United's Evra during their Europa League soccer match in Manchester.Reuters
Athletic Bilbao's de Marcos celebrates scoring with teamates against Manchester United during their Europa League soccer match in ManchesterReuters
Manchester United's Javier Hernandez, Michael Carrick and Ryan Giggs prepare to kick off after Athletic Bilbao's Oscar de Marcos scored in Manchester.Reuters
Manchester United's Rooney celebrates scoring against Athletic Bilbao during their Europa League soccer match in Manchester.Reuters
Athletic Bilbao's Martinez challenges Manchester United's Evra during their Europa League soccer match in Manchester.Reuters
Manchester United's Park Ji-sung is challenged by Athletic Bilbao's Markel Susaeta and Andoni Iraola during their Europa League soccer match in Manchester.Reuters