Complex sentence: Dimitrov was rumored to be dating Serena Williams in early 2012 and then Maria Sharapova in late 2012, the two only confirmed their relationship after the 2013 Madrid Open, where the Bulgarian managed his first win against a world No.1, beating Novak Djokovic.
Split into simpler sentences: Dimitrov was rumored to be dating Serena Williams in early 2012 and then Maria Sharapova in late 2012. The two only confirmed their relationship after the 2013 Madrid Open, where the Bulgarian managed his first win against a world No.1, beating Novak Djokovic.