At the 2017 World Aquatics Championships in Budapest, in the Men's 4 × 100 metre freestyle relay, the Brazilian team composed by Chierighini, César Cielo, Bruno Fratus and Gabriel Santos achieved a historic result by winning the silver medal, the best Brazilian result of all time at World Championships in this event. Brazil beat the South American record set in 2009, in the super-suits era, with a time of 3:10.34, just 0.28 behind the US team. The last World Championship medal Brazil won in this race was won in 1994. Chierighini did the fastest split of the entire field (46.85), and the third-fastest split ever in a textile jammer. He also finished 5th in the Men's 100 metre freestyle final, equalling his best time (48.11), and 5th In the Men's 4 × 100 metre medley relay, along with Henrique Martins, João Gomes Júnior and Guilherme Guido.