sentences:  Wayne Rooney opened the scoring when he fired home an excellent 20-yard drive after just six minutes, but Watford equalised through Hameur Bouazza's overhead kick in the 26th minute.United restored their lead two minutes later when Cristiano Ronaldo bundled in Rooney's cross, and Rooney wrapped up the win with a close finish after 66 minutes.Substitute Kieran Richardson chipped in a fourth to secure United's place in the final.