US Open SuperStar Rory McIlroy tweeted today: “Thanks to everyone for all the messages over the past few hours. It was a very special week for me. Proud to be a major champion!”Rory’s girlfriend Holly Sweeney stayed at home in Northern Ireland but watched Rory throughout the four-day tournament. She tweeted: “My fabulous boyfriend has played flawlessly all week! Drink up northern ireland he’s done us proud! Here’s to the sick days tomorrow WOOOOO.”Rory McIlroy has the potential to become the world’s highest-paid sportsman and could rack up career earnings that rival the £1bn amassed by Tiger Woods, according to marketing experts.