Middleweight contender Sergiy Derevyanchenko, a mandatory challenger for one of the world titles held by Gennady Golovkin, will be in one of several fights formally added on Wednesday to the undercard of heavyweight world titleholder Deontay Wilder's defense against Luis "King Kong" Ortiz on March 3 at Barclays Center in Brooklyn, New York.
The Brooklyn-based Derevyanchenko (11-0, 9 KOs), 30, will face durable journeyman Dashon Johnson (22-22-3, 7 KOs) in an eight-round bout in preparation for what he hopes will be a bigger fight in the spring or summer.
Derevyanchenko, a 2008 Ukrainian Olympian, was initially scheduled to fight Johnson on Jan. 20 at Barclays Center on the Errol Spence Jr.-Lamont Peterson undercard, but the fight was postponed because Derevyanchenko came down with a fever and flu-like symptoms a week before the fight.
The fight will be Derevyanchenko's first since Aug. 25, when he stopped Tureano Johnson in the 12th round of a world title elimination bout to become the mandatory challenger for one of the 160-pound belts held by unified world champion Golovkin.
Johnson, 30, of Escondido, California, doesn't have an impressive record, but he has been stopped only three times in his nearly two dozen losses, and in his last fight, in September, he gave former middleweight world titleholder Peter Quillin a very tough fight in an eight-round decision loss.
Also added to the card was junior welterweight prospect Gary Antuanne Russell (3-0, 3 KOs), the 21-year-old 2016 U.S. Olympian and younger brother of featherweight world titlist Gary Russell Jr. Gary Antuanne will face an opponent to be determined in a scheduled six-round bout.
In other fights announced Wednesday:
Junior middleweights Patrick Day (14-2-1, 6 KOs), 25, of Freeport, New York, and Kyrone Davis (13-1, 5 KOs), 23, of Wilmington, Delaware, will meet in a 10-round bout.
Former heavyweight world titlist Charles Martin (25-1-1, 23 KOs), 31, of Carson, California, will face an opponent to be named in an eight-round bout. Martin won a vacant world title by third-round knockout of Vyacheslav Glazkov in January 2016 and held the belt for only three months before getting knocked out in the second round by Anthony Joshua in his first defense. Martin has won two fights since by first- and second-round knockout against low-level opponents.
Former two-time middleweight world title challenger Willie Monroe Jr. (21-3, 6 KOs), 31, of Rochester, New York, will face an opponent to be determined in an eight-rounder. Monroe lost by sixth-round knockout challenging Golovkin for his title in 2015 and is coming off a unanimous-decision loss challenging titlist Billy Joe Saunders for his belt in September.
Three other welterweights also will see action in separate six-round fights: Brooklyn's Richardson Hitchins (3-0, 1 KO), 20, a 2016 Haitian Olympian; Staten Island's Kenny Robles (2-1, 1 KO); and Kazakhstan's Shynggyskhan Tazhibay (5-0, 2 KOs), 25, in a six-round welterweight bout.
Wilder-Ortiz along with Jermall Charlo against Hugo Centeno Jr. for a vacant interim middleweight title and the rematch between interim super middleweight titlist Andre Dirrell and Jose Uzcategui will air on Showtime (9 p.m. ET) with the remainder of the bouts announced on the untelevised portion of the card.