Analysis of new Arsenal midfielder Fabio Vieira by Portuguese football expert Pedro Sepulveda:
"We are talking about a player who plays on the right wing and he uses his game to move from the wing to the middle. But he can easily play in other places like the left wing and as an offensive midfielder, a No 10, as he is not that fast. But he has a lot of flexibility with the ball and very good positioning without the ball as well.
"Many people in England are maybe asking why Arsenal are paying that money for a player who was not always in the Porto XI, but if you look at the numbers, they do not lie - he played 39 games for Porto last season, with seven goals and 16 assists.
"If you look at the goals he scored, they were all in important matches. He scored against Sporting, the champions from the previous season, and against Benfica, Porto's other great rival. And the time he was on the pitch, he was making great performances, including in the Champions League too."