After two second round Ladies' Singles matches (Agnieszka Radwanska-Alberta Brianti and Flavia Pennetta-Monica Niculescu) scheduled to begin at 12:00 PM London time (7 AM EST), No. 23 John Isner and qualifier Nicolas Mahut will resume the fifth set of their incredible first round match with the score deadlocked at 4-6, 6-3, 7-6(7), 6-7(3), 59-59.
Organizers have stipulated that even if the two preceding matches finish quickly, Isner-Mahut is not to resume before 3:30 PM London time (10:30 EST).
I wouldn't expect either Radwanska or Pennetta to need more than two sets to win their respective second round matches, so hopefully Isner-Mahut will be able to resume right at 3:30, or at least close to it.
Despite the enormity of this historic match, the organizers have decided to follow protocol and keep the match on small Court 18, a venue so far from the many of the other courts at Wimbledon that Jelena Jankovic once whined that it felt like she needed "a helicopter to go to my court."