British number one Johanna Konta says she faces a "great test" against former world number four Dominika Cibulkova in the Wimbledon second round on Thursday.
Konta plays the Slovak - who missed out on a seeding to Serena Williams - in the second match on Centre Court.
Kyle Edmund, Britain's men's number one, follows on the same court against American qualifier Bradley Klahn.
Briton Katie Boulter meets Naomi Osaka, while world number ones Rafael Nadal and Simona Halep also play.
Twenty four of the 64 seeded players - 12 men and 12 women, including five of the top 10 females - are already out.