[4] Abreu is a very active BJJ competitor and coach, with multiple titles including gold medals at the 2010, 2011, 2012, 2017, 2019, and 2021 IBJJF No-Gi World Championships.

Abreu also entered the absolute division where he beat Luiz Paulo, Izaak Michell, and Giancarlo Bodoni on points before being submitted by Kaynan Duarte in the final and winning a silver medal.

[20] Abreu currently living in Miami, United States where he runs his academy Fight Sports coaching multiple high level BJJ athletes.

[21] In 2020, a BJJ black belt under Abreu and instructor at Fight Sports Naples, Marcel Goncalves, was accused of sexual assault by a student of his who was 16 years old at the time of the incident.

[22] Initially, Abreu drew heavy criticism for his handling of the claims and how he chose to comment on them before he eventually put out a further statement that denounced Goncalves' actions.

[27] Mandy Schneider was allegedly sexually assaulted by Rodrigo da Costa Oliveira, the coach of Rockstar Martial Arts Gym in Frisco, Texas, in a hotel room.

[28] The lawsuit claimed that "The repeated failures of Roberto Abreu and Fight Sports to ensure the safety of underage athletes have fostered an environment ripe for such abuse."