Mexican National Lightweight Tournament, 1966
The first part of the tournament was held on March 13. Reyes Oliva, Tizoc, Tom Mix, Javier Meza, Pedro Nieves, Dick Angelo are mentioned by Lucha libre 167 as participating (and being eliminated in this stage.)
The two met again in the same arena on April 3rd with Costa winning by disqualification.
Rojas would defeat Costa for the title shortly after, on April 22th, in the same arena.