By Darren Wells Conor Benn earned an impressive yet hard-fought win over Peter Dobson in Las Vegas on Saturday. Both fighters went into the welterweight clash at the Chelsea Ballroom in the Cosmopolitan Hotel unbeaten, with Benn extending his own record to 23 victories without loss, while Dobson suffered his first defeat in 17 fights, Benn, who was fighting in the United States for a second time in recent months as he continues to try and clear his name in the UK following his drugs controversy, eventually proved too strong for American Dobson, dominating the scorecards 119-109, 118-110, 118-1…