How do you mend a broken heart? If you’re Rory McIlroy, playing well might help a little. The 25-year old broke off his engagement with Danish tennis player Caroline Wozniacki this week, just days after sending out wedding invitations (how long before one of those pops up on the Internet?). She updated her Twitter avatar and bio earlier today (tweeting, “Happy I support Liverpool right now because I know I’ll never walk alone”). He fulfilled his commitment to play in this week’s BMW PGA Championship at England’s Wentworth Club. “I'm not going to lie. It's going to be very difficult,” he said. “But you know, at least when I get inside the ropes I can just try and concentrate on the shot at hand. But yeah, it's obviously going to be difficult.” Not so much so that he couldn’t shoot a 4-under 68 in today’s first round.