Mata told The Sun: "We are all very excited about Barcelona. Any person who likes football most love the way they play. At Valencia we beat Barcelona in the semi-finals of the Copa Del Rey so I know they are not unbeatable.
"Many of the Barcelona players are my team-mates in the Spanish squad. know the way they play and train. I know the quality they have and now I would just like to know their weaknesses!
"We will have to be 100 per cent to beat them. But we can do it."