"I've chosen what I believe is the best option for me and I haven't made a mistake. I had no doubt. When I found out that Barca wanted me, I was thrilled," Gomes said.Barcelona said the initial transfer fee would be 35 million euros but that performance-based extras could make the final figure as much as 70 million.Gomes had been linked with Barca's arch-rivals Real Madrid and with Manchester United after an impressive two seasons at Valencia whom he joined from Benfica.He becomes Barca's fourth close-season signing after the arrival of Samuel Umtiti, Denis Suarez and Lucas Digne.But he says he is not afraid of the competition at the Nou Camp."There are many players in Barcelona's central midfield and they are all great," Gomes said. "I just want to continue to grow, learn and at 22 I have time to do that."Barca also announced that Argentina international Javier Mascherano had signed a one-year contract extension which will keep the defensive midfielder at the club until June 30, 2019.Barca made the 32-year-old's future a priority with reports in Italy and Spain linking Mascherano with a move to Juventus this summer.