Hernández mainly plays on the Future Tour and the ATP Challenger Tour . On the former he has so far won three singles titles and twelve doubles titles.
In 2015 he made his debut on the ATP World Tour at the Millennium Estoril Open in Estoril . Although he lost 2: 6, 2: 6 in qualifying against Kenny de Schepper , he moved into the main draw as a lucky loser , where he even had to compete in the round of 16, because the failed Tommy Robredo as the third set a bye for the first Got round. There he was defeated by his compatriot Pablo Carreño Busta 1: 6, 2: 6. In June 2018 he celebrated his first challenger title in doubles. Together with Fabrício Neis , he was able to assert himself in Blois .