Complex sentence: The 2009 US Open champion is making his debut at Stoke Park this year and we're delighted to welcome not just a Grand Slam champion but a credible rival to Rafael Nadal, Novak Djokovic and Roger Federer at the top of the men's game.
Split into simpler sentences: The 2009 US Open Champion is making his debut at Stoke Park this year. He is not just a Grand Slam Champion, but also a credible rival to Rafael Nadal, Novak Djokovic and Roger Federer at the top of the men's game.