Teenager Alex Michelsen beat four-time tournament champion John Isner 7-6 (6), 6-4 in an all-American semifinal at the Hall of Fame Open in Newport, Rhode
Read MoreTeenager Alex Michelsen beat four-time tournament champion John Isner 7-6 (6), 6-4 in an all-American semifinal at the Hall of Fame Open in Newport, Rhode
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