Linda Noskova beat Coco Gauff 6-3, 6-3 on Tuesday to clinch a WTA Finals semi-final spot. Jessica Pegula knocked Marta Kostyuk out with a 6-2, 7-5 straight-sets win after opening with a loss to Gauff. Noskova has won both group matches without dropping a set. Gauff and Pegula are both 1-1; Thursday’