Joe Smith Jr.-Maxim Vlasov live results and analysis 3dMark Kriegel play Efe Ajagba unloads for massive one-punch KO (1:02) Efe Ajagba needs just one punch to drop Brian Howard in Round 3 of their bout on Top Rank Boxing. (1:02) University of North Texas graduate Light heavyweight contenders Joe Smith Jr. and Maxim Vlasov will fight in the main event of Saturday's Top Rank Boxing card with the vacant WBO world title on the line. The show takes place at the Osage Casino in Tulsa, Oklahoma (ESPN and ESPN+, 10 p.m. ET, with undercard fights on ESPN+ at 5:30 p.m. ET). Smith (26-3, 21 KOs), 31, of Mastic, New York, has won two consecutive fights since losing a unanimous decision when he challenged Dmitry Bivol for the WBA light heavyweight title in March 2019. In 2020, Smith defeated Jesse Hart by split decision, and Eleider Alvarez by ninth-round TKO.