MANCHESTER - Chelsea manager Rafael Benitez accused his Manchester United counterpart Alex Ferguson of failing to shake hands before their FA Cup quarterfinal on Sunday in the latest chapter in their fractious relationship.The teams drew 2-2 after Chelsea, who conceded two early goals, launched a strong second-half fightback to recover from two goals down and earn a replay.Benitez said he had waited before the match to greet Ferguson but that the Scot, with whom he traded many jibes in his days as manager of United’s arch-rivals Liverpool, had walked past him."I was waiting at the beginning,” the Spaniard told a news conference. "I have education because I know a lot of people are watching so I know what you have to do.”Ferguson was fuming after United’s controversial Champions League exit to Real Madrid on Tuesday and did not give a post-match news conference following the Chelsea game, spurning the opportunity to explain his take on the Benitez incident.The Chelsea manager urged the gathered reporters to tackle Ferguson over the matter. "Ask him, if you are brave enough,” he said.