Four of the top 10 women’s seeds failed to make it out of the first round: No. 2 Coco Gauff, No. 3 Jessica Pegula, No. 5 Zheng Qinwen and No. 9 Paula Badosa. In all, a record-tying 23 seeded players — 10 women, 13 men — were gone by the end of Day 2, equaling the most at any Grand Slam event in the past 25 years.