By Richard Martin BARCELONA (Reuters) - Barcelona's attacking trio of Lionel Messi, Luis Suarez and Neymar were all on target as the champions roared back into life in La Liga by thrashing promoted Leganes 5-1 away on Saturday, while Atletico Madrid thumped visitors Sporting Gijon 5-0. Atletico strikers Antoine Griezmann, Fernando Torres and Kevin Gameiro all found the net as Diego Simeone's side warmed up for next Wednesday's visit to the Nou Camp. More...