Atsushi Miyagi, who won the 1955 U.S. Open doubles championship, died of bladder cancer on Wednesday at an assisted living facility in Tokyo. He was 89.The 1955 title, with compatriot Kosei Kamo, remains the only Grand Slam tournament championship won by Japanese men since World War II. Just prior to the U.S. National Championships, which later became known as the U.S. Open, Miyagi and Kamo competed for Japan in the Davis Cup. In the inter-zonal semifinals, Japan, the Eastern Zone champ, lost to eventual champion Australia, led by the great Ken Rosewall.Miyagi began competing at Waseda Uni…READ FULL ARTICLE