Claudio Calasans and Victor Estima met 5 times on record, with Calasans holding a 3 to 2 edge. All five bouts came at the highest level, four of them at events like the 2012 IBJJF World Championship and the 2012 IBJJF Pan Championship, plus one at the 2013 Abu Dhabi World Professional Jiu-Jitsu Championship. Most of these were semi-final or later stage matches, so both men were consistently running into each other deep in brackets.

The styles split along clear lines. Calasans is a positional, points and pressure competitor whose recorded win rate sits at 66% with only 32% of his wins by submission, and his most frequent finish on record is the Armbar. Estima is the more finish-oriented of the two, with 71% of his recorded wins coming by submission and the Estima Lock as his signature. That contrast showed up in their meetings: three of Calasans' results came by points or advantages, while Estima's clearest win was a submission by Bow And Arrow at Abu Dhabi in 2013.

Decisions in this rivalry were tight. Calasans took the 2012 Worlds semi-final on an advantage and the 2015 Worlds semi-final and 2012 Pan final on points. Estima answered with a decision at the 2014 Worlds quarter-finals and the 2013 submission. The margins say these were close, evenly matched competitors more often separated by scoring than by finishes.