Dries Mertens and Romelu Lukaku scored twice as Belgium destroyed Estonia 8-1 to seize top spot outright in World Cup Group H qualifying. Yesterday coach Roberto Martinez's men also struck through Thomas Meunier, Eden Hazard, Yannick Carrasco and an own goal from Ragnar Klavan, with the first three coming inside the opening 25 minutes.Estonia replied just before the half-hour through Henri Anier but it was a lonely highlight for the Baltic nation who are second from bottom with three points.