(Reuters) – British boxers Chris Eubank Jr. and Conor Benn will square off in a highly-anticipated bout at London’s O2 Arena on Oct. 8, three decades after their famous fathers fought each other. Chris Eubank and Nigel Benn were bitter rivals in the 1990s and the two former super-middleweight world champions fought twice – Eubank winning the first bout in 1990 before a split decision draw three years later. Eubank Jr. (32-2, 23 knockouts) has fought at middleweight and super-middleweight while Benn (21-0, 14 knockouts) boxes at welterweight so their meeting will be at a catchweight of 156 poun…