- 1,612
- 9
- 38
Sanchez holds an unbeaten 22-fight record with 15 stoppages and works with Saul 'Canelo' Alvarez's trainer.
"In my opinion, Frank Sanchez is the best heavyweight in the world, trained by the best trainer in the world, Eddy Reynoso," said Borao.
"Tyson probably thinks it is too much risk with easier fights out there, but I'm hoping he proves me wrong."
Arslanbek Makhmudov, sits just below Sanchez in the WBC rankings.
But promoter Camille Estephan insists the fearsome Canada-based contender is purely working towards his next fight against Raphael Akpejiori on July 1, live on Sky Sports.
"Arslanbek is fighting July 1, that is what we are concentrating on for now and Tyson Fury has made it clear in the past that he does not want to fight Arslanbek," Estephan told Sky Sports.
"We have been open [to a Tyson Fury fight] for a while.
"We are fighting on July 1 for the first time in the United States. Our concentration is all on that fight we don't want to look past July 1."