Barcelona has added Luis Suarez to its star-studded forward line but it could be its defensive reinforcements that make the difference as it looks to win back the La Liga title.

The club's first trophyless season in six years has sparked an overhaul with new coach Luis Enrique bringing in fresh faces for many positions ahead of the La Liga campaign that kicks off on Saturday.

All eyes will be on Suarez, signed from Liverpool for a fee reported to be 81 million euros ($108 million), when he finally makes his competitive bow for Barca at the end of October, after he was handed a four-month ban for biting at the World Cup.