Australian Open semifinals are set. Wednesday's matches finalized the opponents, and there is one American left standing in men's singles: 22-year-old Ben Shelton. Shelton, the No. 21 seed, won a grueling quarterfinal against unseeded Cinderella Lorenzo Sonego,

The left-handed Shelton did some entertaining of his own, including earning cheers by doing a couple of push-ups after tumbling in the concluding tiebreaker, and he reached his se