So here’s what people want to know. He is a left-footed winger or enganche. He’s a pretty tall kid but is quite nippy, make no mistake.
What I like, is that he’s dynamic, he covers immense amounts of ground in a match, but is also bloody skilful.
His lung-busting runs in support are an effective weapon for any side, and his first career goal (vs River in 2010) was a sweet finish after one of these trademark bursts.
Now 23, he sustained a serious ligament injury following his debut in 2008 but now he has made himself a fixture in a side that are leading the race for the Championship and have a great shout for the Copa Libertadores crown, finding themselves in the semi-finals.
Javier Zanetti has recommended him to Inter Milan chairman Massimo Moratti and former Juventus (but now of Lanús) winger Mauro Camoranesi has said that he has all the attributes to make it in Serie A.
Italy seemed the most likely destination with all the top clubs monitoring him but the Arsenal interest and apparent signing has caught everyone off guard.
He certainly could be good in England with his work-rate and skill but as always, there are the cultural differences he will have to get used to. Having Spanish members of the squad will definitely help him.