The result - which also included a brace from Mexican striker Javier Hernandez - saw United respond in style to rivals City's 3-0 win over Wigan earlier in the day.  Rooney said: "We always know Bolton is a difficult place to come. "We got an early goal and kicked on from there and it could have been more." He continued: "First start with Chicharito (this season) and both scoring, that's great." "I had a long time to rest and get a good pre-season under my belt. "I've stayed free of injuries and it's helped me for the start of the season." Hernandez missed several chances to complete a hat-trick of his own but said: "The most important thing here is the result. We get three points from a difficult visit like Bolton." He then praised his partnership with Rooney, adding: "Every player can play with Wayne Rooney. He's a world-class player. He can do anything." The win ensured United did not allow City to steal a march on them with their earlier win. United boss Sir Alex Ferguson said: "You just have to concentrate on yourselves. "It's a difficult start to the season, we've got all the bigger names. We've got Chelsea next Sunday. "It's a hectic start and if we come through it, well have done well."