Complex sentence: During his 14-year tour career, he won 14 Grand Slam singles titles, becoming the first player to break Roy Emerson's record of 12 Slams, and was recognized as one of the greatest tennis players of all time.
Split into simpler sentences: During his 14-year tour career, he won 14 Grand Slam singles titles, becoming the first player to break Roy Emerson's record of 12 Slams. He is recognized as one of the greatest tennis players of all time.