[6] He was essential in helping the Minho team win 11 of their first 15 competitive matches, netting on five occasions; on 23 October 2008, he scored from a free kick in another 3–0 upset, this time against England's Portsmouth in the group stage of the UEFA Cup.

However, he would ironically lose his place to Viana, and left in early January 2011, returning to his country after a lengthy absence and joining Peñarol, still owned by Dynamo Moscow.

[12] On 5 July 2011, Aguiar was sold by Dynamo Moscow to Sporting CP, signing a four-year contract with the Lisbon club and reuniting with former Braga boss Paciência.

[15] He subsequently returned to Peñarol for a further three Uruguayan Primera División seasons during which he was involved in several incidents, being loaned to Brazil's Esporte Clube Vitória in 2014.

[18] In the following seasons, Aguiar represented in quick succession Alianza Lima (Peruvian Primera División)[19] and Club Nacional de Football.