New York, NY (April 17, 2019) World ranked middleweight contender Sergiy “The Technician” Derevyanchenko (13-1, 10 KOs), of Brooklyn, NY, was victorious this past Saturday night, April 13, against former world title challenger Jack Culcay (25-4, 13 KOs), of Davie, FL, at the Minneapolis Armory in Minneapolis, MN, taking home a 12-round unanimous decision. Scores …