Jorge Arce has won titles in four different divisions and an interim belt in another, and on Saturday, he'll face three-division champ and current junior featherweight titleholder Nonito Donaire of the Philippines (HBO, 10 p.m. ET/PT).
Arce, a popular Mexican brawler, will be looking to accomplish a new, seemingly impossible mission. Donaire, who has an edge in nearly every measurable aspect, will be stepping into the ring as a huge favorite. Still, it's conceivable that Arce's experience, heart and slugging style could overcome those advantages.
Here are five keys for Arce against Donaire: