Genaro Matias Prono Britez (born April 29, 1989) is a Paraguayan swimmer, who specialized in breaststroke events.

He is also a resident athlete of the Pine Crest Swim Team in Fort Lauderdale, Florida, where he trained with numerous world-class swimmers, including three-time Olympian Bradley Ally of Barbados, and freestyle specialist Daniele Tirabassi of Venezuela.

[2] He challenged seven other swimmers on the third heat, including three-time Olympians Malick Fall from Senegal, and Alwin de Prins of Luxembourg.

Prono edged out Fall to snatch a third spot by 0.19 of a second, breaking his personal best and Paraguayan record of 1:02.32.

Prono failed to advance into the semifinals, as he placed forty-first out of 65 swimmers on the first night of the preliminaries.