[3] He swam in the first-ever Olympic men's 10 km open water marathon, against a field of 24 other competitors, including former pool swimmers Petar Stoychev of Bulgaria and Thomas Lurz of Germany.

Do Carmo finished the race in fourteenth place, with a time of 1:52:16.6, approximately twenty-five seconds behind winner Maarten van der Weijden of the Netherlands.

[4] In 2010, do Carmo narrowly missed out of the medal podium, when he finished fourth for the 10 km open water marathon at the Pan Pacific Championships in Long Beach, California, United States, with a time of 1:56:04.67, two minutes behind Canada's Richard Weinberger.

[7] Few months later, do Carmo recovered from a major setback with a seventh-place time of 2:08.28 in the 10 km at the Pan American Games in Guadalajara, Mexico.

[9] He competed against a field of 61 open water swimmers including Stoychev, David Davies of Great Britain, and Oussama Mellouli of Tunisia, who previously won an Olympic gold medal from the pool.