Sérgio Oliveira. Watch the name.
This Porto product is hailed as being one of the biggest prospects around the world and has a similar style to some of the biggest names Portugal has ever seen in the midfield (names like Rui Costa or Deco). Sérgio Oliveira recently signed a new contract with Porto and he's supposed to be one of the best talents the club has produced in the last years but he has yet to show his skill regularly on the first division so he got loaned out to Beira-Mar.
Basically, you can see he's good technically but his inteligence and tactical knowledge make him better than a regular good midfielder, he's got a brilliant vision and very secure passing for such a lad.
These are just a start, lets see if he confirms these stats during the season