"English football has been good to me because of its characteristics: it's fast, direct and there are very few stoppages, and that suits my game more than Spanish football," said the striker.
"My natural qualities - the speed, the power - fit the Premier League.
"I play as a number nine up alongside the centre-backs. If I played there in Spain, maybe it wouldn't suit me as I would hardly see the ball.
"Rafa was looking for a striker with my characteristics - someone quick who could surprise defenders and get behind them - but I had to learn too.
"For a lot of coaches the tactical side of the game doesn't matter that much but for Rafa it is fundamental; he is conscious of the way we set up, the movement, the organisation.
"I've learnt a lot. It's been a real pleasure for me to work with Rafa."