Former Barcelona star Rivaldo has sent a warning to the Catalan club after Real Madrid unveiled Kylian Mbappe this week.
The French forward was finally unveiled at the Santiago Bernabeu on Tuesday after joining the Spanish giants on a free transfer from Paris Saint-Germain.
Blaugrana, meanwhile, are yet to make any new additions to their squad but have been heavily linked with Athletic Bilbao and Spain star Nico Williams.
Read: Mbappe 'Left Out' Of Real Madrid Tour
Even if the Catalans land Williams, Rivaldo claims that will not be enough to compete with their fierce rivals.
"I have great affection for Barca, but I cannot lie, Real Madrid are ahead. If Nico Williams goes to Barca, it's positive, but one or two more signings are needed to be 'that' team who enchants the world", as per reports from Marca.
"Barca need to show they are as strong as Real Madrid. On paper, with the signing of Nico Williams, they would be strong, but they have to prove it, especially in El Clasico.
"Barca can't just sign Nico Williams to beat Mbappe's Real Madrid."
Barcelona still limited due to their financial troubles, which means they would need to sell players in order to bring in new arrivals.
