Sérgio Dutra dos Santos, known as Serginho or Escadinha (born 15 October 1975) is a Brazilian volleyball player, a member of Brazil men's national volleyball team and Brazilian club SESI São Paulo, 2004 and 2016 Olympic Champion, double silver medalist of the Olympic Games (2008, 2012), World Champion (2006, 2010), multimedalist of the World League, South American Championship, World Cup and the Grand Champions Cup, 2011 Brazil Champion. In 2009 he became the first libero to be named Most Valuable Player in the history of the FIVB World League.
He is widely regarded as one of the best liberos of all time and is unquestionably the best libero of the 2000s, with more awards than any other libero. Known for his outstanding service reception and digging capabilities, teams often attempt to avoid Sergio when serving. Beyond his defensive abilities, he is also capable of running the offense as a 'second setter' if the setter is forced to make the first contact. 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.