Complex sentence: Belkin was a top-ranking collegiate player at the University of Miami, reaching the finals of the 1965 NCAA individual championships where he lost to Arthur Ashe 4-6,1-6,1-6.
Split into simpler sentences: Belkin was a top-ranking collegiate player attending the University of Miami. He reached the finals of the 1965 NCAA individual championships where he lost to Arthur Ashe 4-6,1-6,1-6.