Ben Shelton’s Australian Open quarterfinal foe, Lorenzo Sonego, produced the shot of the tournament – diving to his left for a volley with so much spin that the ball bounced on one side of the net, then floated back over to the other – but it was the American who ended up with the victory Wednesday. 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 reached his second Grand Slam semifinal at age 22 by beating the unseeded Sonego 6-4, 7-5, 4-6, 7-6 (4). “I’m relieved,” said Shelton, who will meet No. 1 Jannik Sinner of Italy or No. 8 Alex de Minaur of Australia on Friday for a spot in Sunday’s final. “Shout out Lorenzo Sonego, because that was some ridiculous tennis.” Shelton, who is seeded 21st, closed the first set with a 144 mph (232 kph) ace, tied for the fastest serve at Melbourne Park over the past 1 1/2 weeks, and flexed his left arm after smacking a powerful forehand to close a 22-stroke point and earn a break in the second. His father Bryan, a former tour pro who is Ben’s coach, grinned, too, while patting his own right biceps. A few points from the end, Shelton sprinted to get his racket on a seemingly unreachable ball, and fell into a courtside advertising board as Sonego hit an easy winner to take the point. Shelton stayed on the ground for a bit, then earned applause for his effort – and post-fall calisthenics. When Shelton ended things with 26th forehand winner – he had zero via backhands – he flexed again and sneered until his expression morphed into a smile. As good as Shelton is with his serves and forehands, his improving return game is a significant part of what carried him to the final four at the Australian Open for the first time. He did just enough in that department, accumulating 11 break points and converting three, against Sonego, an Italian ranked 55th. Shelton entered the match coming through on 52% of his break chances, the highest rate among the eight men’s quarterfinalists.