Albert Sambi Lokonga has joined Arsenal from Anderlecht. The fee is believed to be around £15million. The 21-year-old joins Arsenal on a long-term contract after making 78 appearances for the Belgian club, where he played under former Manchester City captain Vincent Kompany. "It's a big move because I have been playing for Anderlecht for 10 years so it's going to be my first big move to another country," Lokonga told Arsenal's website. "It's a big step, but I feel confident because we have to be. In the football world, you have to feel confident about yourself, but I'm looking to play in this league and I can't wait to start." When asked if he prefers to play as a box-to-box midfielder or in a more attacking role, Lokonga added: "I can play both. He is expected to travel to Florida with the rest of the squad on Wednesday for their pre-season training camp. A Belgium U21 international, Lokonga received his first senior call-up earlier this year when he was an unused substitute against Greece, and Arsenal boss Mikel Arteta is excited by the midfielder's potential. "Albert is a very intelligent player who has shown great maturity in his performances during his development," said Arteta. "He has been coached well by Vincent Kompany and his team at Anderlecht. I know Vincent very well and he talks so highly about Albert and the positive impact he had to Anderlecht in recent seasons.