Claudio Calasans and Victor Estima met 7 times on record, and Calasans holds the edge at 5 wins to 2. Most of those meetings landed at the medium weight, and most came at the same event across a few seasons. Calasans took their meetings at the 2015 IBJJF World Championship, the 2013 IBJJF World Championship, the 2012 IBJJF World Championship, the 2012 IBJJF Pan Championship, and the 2012 Pan American Jiu Jitsu Championship. Estima answered at the 2014 IBJJF World Championship and the 2013 Abu Dhabi World Professional Jiu-Jitsu Championship.

The way they win separates them. Estima finishes a much higher share of his wins, 69% of his recorded wins by submission against 30% for Calasans. Estima is also a namesake for the Estima Lock, with 7 wins by that finish, while Calasans leans on the Armbar with 7 wins. Calasans carries the larger sample overall at 184 recorded matches and a 66% win rate, compared to 74 recorded matches and a 61% win rate for Estima.

Decisions in this rivalry mostly came down to scoring rather than finishes. Four of Calasans wins came on points, and one came on advantage. Estima's two wins split into one decision and one submission, a Bow And Arrow at the 2013 Abu Dhabi event. So while Estima is the bigger finisher by rate, the finish that landed head to head went his way once.