Barcelona vice-president Javier Faus has warned they must reign in transfer spending.

Barca have already splashed out €15 million to land Valencia fullback Jordi Alba.

"Last year we surpassed our transfer budget with the signings of Cesc Fàbregas and Alexis Sánchez. We cannot overspend our budget by 20 or 30 million euros each year, it would put our business plan at risk. It wouldn't be sustainable," said Faus.