Updated

Linda Noskova, the Wimbledon champion, beat Coco Gauff 6-3 6-3 at the WTA Finals in California on Monday, becoming the first player to reach the semi-finals. Noskova, the world number eight from the Czech Republic, broke Gauff's serve four times in the first set and committed only one unforced error in the second. Gauff, the fourth-ranked American, won only six of 24 points behind her second serve and still has a chance to qualify, as does compatriot Jessica Pegula. Noskova, 21, was playing on her tournament debut and recorded her sixth top-10 win of the season. Earlier, Pegula beat Ukraine's Marta Kostyuk 6-2 7-5 after a scrappy match with seven breaks of serve; Kostyuk had only been called in after world number one Elena Rybakina withdrew and has a wrist injury.