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Roger Adrià powers past Alex Aranburu for Grand Prix de Wallonie victory
Clément Champoussin third on cobbled climb to Namur -
Grand Prix de Wallonie: Serrano outsprints Teuns for victory
De Buyst finishes third, Van der Poel fourth at Citadelle de Namur -
Van der Poel lays down Worlds marker with GP de Wallonie win
Dutchman holds off Girmay, Serrano takes third
