JOIN USAlexis Sanchez struck twice and created a goal for Neymar as Barcelona recovered from conceding early to maintain their perfect La Liga start with a 4-1 win at home to Real Valladolid on Saturday.
An eighth victory in eight games for the champions restored their five-point advantage over arch-rivals Real Madrid who needed a Cristiano Ronaldo goal in the fourth minute of stoppage time to secure a 3-2 triumph at Levante earlier.
Diego Costa took his La Liga goal tally to 10 this season despite missing a penalty as Atletico Madrid kept pace with Barcelona at the top of the table with a workmanlike 2-1 win over Celta Vigo on Sunday.
Unbeaten Atletico are level on 24 points with Barca, five points ahead of Real Madrid.
Valladolid forward Javi Guerra silenced the Nou Camp when he headed in a corner in the 10th minute but Barca were level four minutes later, Alexis lashing the ball home from just outside the penalty area.
Cristian Tello squared for Xavi to sidefoot the ball in seven minutes after the break before Neymar sent Alexis clear on the right in the 64th minute and he sent a precise shot into the far corner.
The Chilean returned the compliment by setting up Brazil forward Neymar to make it 4-1 six minutes later as Barca, who have also won both Champions League outings this season, continued their impressive form under new coach Gerardo Martino.