Sérgio Dutra dos Santos, known as Serginho or Escadinha (born 15 October 1975) is a Brazilian former volleyball player and four-time Olympian.

Known for his outstanding service reception and digging capabilities, teams often attempt to avoid Sergio when serving.

This is in large part due to Sergio playing the setting position while growing up and subbing in as a setter for his professional club teams over the years.

Bernardinho claimed that, while Serginho no longer had the agility that made him famous, he had experience and maturity to lead the team during a tournament that would certainly be rife with pressure on the Brazilian team, since they were playing on their country and coming from two losses on previous Olympics.

Eventually, Brazil won the gold medal against Italy, and Serginho was acclaimed by the cheering fans, who called him king.