Paulo Diego Messias dos Santos or Didi (born August 9, 1987) is a Brazilian football player who plays as a midfielder for OlÃÂmpico. In 2013 season, he left Indonesian club Persiba Balikpapan after his debut against Sriwijaya F.C. in the opening match of 2013 Indonesia Super League season, he played for 25 minutes before suffering a severe ankle injury in a collision with the opposing team defender.