Coco Gauff was eliminated in the second round of the Qatar Open on Tuesday, losing in straight sets to Czech Katerina Siniakova.
The world number three’s 6-2, 6-4 defeat in her first round in Doha marked the first time she had failed to reach the quarterfinals of a tournament since Wimbledon last year.
US Open winner Gauff dropped serve six times in an error-filled performance, losing a 4-0 lead in the second set.
Siniakova will meet Danielle Collins in the final sixteen.
Earlier on Tuesday, Zheng Qinwen won her first match since losing the Melbourne final to Aryna Sabalenka, defeating Magda Linette 6-2, 2-6, 6-3.