AFP, Barcelona :A Lionel Messi-inspired Barcelona sealed a league and Cup double as they swept aside Athletic Bilbao 3-1 to win the Copa del Rey for a 27th time on Saturday.Messi opened the scoring in spectacular fashion by dribbling past four Athletic players and lashing home a low finish before Neymar added a second before half-time.The Argentine grabbed his second of the game to kill the tie as a contest 17 minutes from time before Inaki Williams grabbed a consolation for the Basques.Despite Athletic fans dominating two-thirds of the 99,000 capacity Camp Nou, there was nothing their players could do to stop a rampant Barca that is now just one game away from just the second treble in the club’s history.Luis Enrique’s men face Italian champions Juventus in the Champions League final in Berlin on June 6.”From the start we saw a great Barca with all the players at a high level,” said Barcelona boss Luis Enrique.