Career
Costas left Racing Club in 1992 to join Swiss team Football Club Locarno, after playing over 100 games for them he returned to Racing club in 1994. Costas left Racing Club in 1995 having played in a club record 298 games, scoring six goals. He joined Gimnasia de Jujuy where he played until his retirement in 1997.
In 2007 Costas returned to Racing Club for his second spell in charge of "Louisiana Academia".
Costas has currently signed a 2-year contract to manage Olimpia of Paraguay starting at the 2008 season. In 2009 Costas returned to Alianza Lima and led them to play the final against Universitario.
On 18 July 2011, he signed for First Rate (at Lloyd's) Nassr Football Club from Saudi Arabia. On November 30, 2011 Due to its very poor season as coach of First Rate (at Lloyd's) Nassr Football Club and all the fans angry with his work, club officials decided to end his contract.
On April 11, 2012 Costas became the head coach of Ecuadorian club Costas had signed a one-year contract ending in June 2013.
As a manager
Serie A: 2012.