Terence Crawford is staring down the biggest challenge of his career this weekend at Allegiant Stadium in Las Vegas. Moving up two weight classes to face Canelo Alvarez is no simple task for any fighter, but the 37-year-old has spared no effort, so when the bell rings, the decision will be in his favor. But who has he been sparring with for the fight?

From an intense training regimen to carefully selecting sparring partners, Crawford has been meticulous in his preparation. For this blockbuster showdown, the Nebraskan technician has brought in none other than Lester Martinez , who will not only sharpen Crawford’s skills in camp but also feature on the undercard of Canelo vs. Crawford, streaming live on Netflix.

Lester Martinez as Terence Crawford’s trusty sparring partner

The undefea

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