Complex sentence: António van Grichen (born October 3,1978 in Lisbon, Portugal) is a tennis coach, best known for being the former coach of former WTA World No.1 Victoria Azarenka.
Split into simpler sentences: António van Grichen (born October 3,1978 in Lisbon, Portugal) is a tennis coach. He is best known for being the former coach of former WTA World No.1 Victoria Azarenka.