I didnt see the U20 w/c. If he impressed, that's a shame, from the facts and stats about him we'd be a good fit. We already have a young Uruguayan on our books, he himself is only 20, an attacking player, and his Nacional stats are good - http://espnfc.com/player/_/id/158613/gonzalo-bueno?cc=5739
Last linked well over a month ago though http://www.dailymail.co.uk/sport/football/article-2336569/Southampton-close-signing-Gonzalo-El-Zorro-Bueno.html
and a good article on the "wonderkid" http://footballwonderkidscout.co.uk/#/wonderkid-of-the-month-gonza/4562740789
Sounds good to me! Could be a surprise in the Premier League next season and fulfils the need for a winger.