[6] At the 2014 Pan Pacific Swimming Championships in Gold Coast, Queensland, Australia, he won a bronze medal in the Brazilian 4×100-metre freestyle relay, along with Bruno Fratus, Marcelo Chierighini and Nicolas Oliveira.

[8] At the 2014 FINA World Swimming Championships (25 m) in Doha, Qatar, João de Lucca won a bronze medal in the 4 × 50 metre mixed freestyle relay (along with César Cielo, Etiene Medeiros and Larissa Oliveira).

The Brazilian team broke the South American record with a time of 1:29.17, only 4 hundredths slower than Russia, who won the silver medal.

[13] In the Men's 200 metre freestyle (it was the first race of the competition for de Lucca), he did not swim well and failed to qualify for the final, finishing in 19th place.

[17][18] At the 2015 World Aquatics Championships in Kazan, João de Lucca finished 4th in the Men's 4 × 100 metre freestyle relay, along with Marcelo Chierighini, Bruno Fratus and Matheus Santana.

César Cielo didn't swam the final - despite being participating in the championship, he was feeling shoulder pain on this day.