American teenager Amanda Anisimova said she was "excited" and did not suffer from nerves after stunning defending champion Simona Halep on Thursday to reach a French Open semi-final against Australian eighth seed Ashleigh Barty. The 17-year-old downed Halep 6-2, 6-4 on Court Philippe Chatrier to announce herself on the big stage, while Barty saw off 14th seed Madison Keys 6-3, 7-5 to also become a first-time Grand Slam semi-finalist. "If I didn't look nervous is because I wasn't," said world number 51 Anisimova, who is the youngest player to reach a major semi-final since Nicole Vaidisova at the 2007 Australian Open. "I was just super excited and I was really happy with the opportunity. "This is more than I could have asked for."

The last-four ties will be played on Friday, after Wednesday's downpour in Paris caused a backlog of matches, with the women's semi-finals held on Court Suzanne Lenglen and Simonne Mathieu to keep Chatrier free for the men's semis. "Actually, I'm really happy that I get to play tomorrow," said Anisimova. "I don't have to wait a whole day, because I get really eager to want to go on the court, so I'm happy I get to play tomorrow." She is the youngest American woman to make the last four at a major since Venus Williams at the 1997 US Open, and the youngest to reach the semis at Roland Garros since Jennifer Capriati in 1990. The defeat for third seed Halep means it has now been 12 years since the last successful title defence in Paris -- Belgian Justine Henin's third straight triumph in 2007. Still only five women have lifted back-to-back French Open titles in the Open era. "I feel sad, because every time when I lose, I'm sad," said Halep.