Adelaide International: Coco Gauff beats Shelby Rogers to reach semi-finals; Teichmann defeats Sevastova to progress

Coco Gauff and Jil Teichmann advanced to the Adelaide International semi-finals on Thursday after three-set wins on the Memorial Drive hard courts.The 16-year-old Gauff beat Shelby Rogers 2-6, 6-4, 6-4, and Teichmann defeated Anastasija Sevastova 6-4 ,6-7 (8), 7-5.Gauff has won five straight matches in Adelaide, including two in qualifying, since her second-round loss to fifth-seeded Elina Svitolina at the Australian Open. She and Rogers had an extended rally in the ninth game of the third set, which Gauff won after setting up game point with a cross-court return.Gauff will next face second-seeded Belinda Bencic, who beat Storm Sanders 6-2, 6-4.Teichmann had five match points in the second-set tiebreaker against Sevastova but was unable to close it out. The 23-year-old Swiss player was then forced to save two match points while trailing 5-4 in the third.“It was a rollercoaster and what I felt was nerves,” Teichmann said. “It was a very tense match, very long rallies every time. Anastasija is a tough player and you have to play every point and every game, doesn’t matter if you’re serving or returning.”French Open champion Iga Swiatek advanced to the semi-finals when American opponent Danielle Collins retired with an undisclosed injury while trailing 6-3, 3-0.Collins, who beat top-ranked Ash Barty on Wednesday in the second round, appeared to wince in pain during her service action in the final point before retiring.“Unfortunately we couldn’t finish," said the fifth-seeded Swiatek, who will next play Teichmann. "Hopefully Danielle is going to be well soon.”