LONDON (Reuters) - American Sofia Kenin became the highest women's seed to fall so far at Wimbledon as she suffered a 6-2 6-2 second-round defeat at the hands of compatriot Madison Brengle on Wednesday.
The 2020 Australian Open champion Kenin, seeded four, never got going on a cool Court Two and lasted only 45 minutes against the 31-year-old.
Several other Grand Slam champions avoided early exits though on the slick lawns.
Former Wimbledon champion Garbine Muguruza maintained her dominant form as she reached the third round with 6-1 6-4 win over Dutchwoman Lesley Pattinama Kerkhove.
Muguruza, winner in 2017, has dropped six games so far.
Last year's French Open champion Iga Swiatek, seeded seven, got the better of 36-year-old Russian Vera Zvonareva.
Swiatek made light work of a tricky first round against the 2010 runner-up, winning 6-1 6-3.
(Reporting by Martyn Herman; Editing by Toby Davis)