Ruthless Spain maul Liechtenstein to lay down marker

By Richard Martin BARCELONA (Reuters) - Spain started their World Cup qualifying campaign with a crushing 8-0 win over Liechtenstein, laying down a marker in Group G with a ruthless second-half display on Monday. Diego Costa scored his first goal for Spain in almost two years to put Julen Lopetegui's side ahead in the 10th minute in their first competitive game under their new coach and Sergi Roberto doubled the lead in the 55th. Costa got his second while David Silva and substitute Alvaro Morat