It's 7am on Copacabana beach as Thiago Costa watches the heavy ocean waves with a special challenge in mind: to catch a barrel wave.
Since 2018, Thiago has set himself the challenge to surf 100 days a year in Rio de Janeiro's waters, trying to catch at least one barrel wave each time.
Posting on his social media daily, his project aims to inspire and prove wrong those who thought Rio's waves weren't good enough.