Liverpool manager Brendan Rodgers accompanied his son Anton to the Old bailey ahead of his re-trial commencing.
Brighton and Hove Albion players Rodgers, Lewis Dunk and George Barker, and former team-mate Steve Cook, who now plays for Bournemouth, deny sexual assault and voyeurism.
The jury were unable to reach a verdict in February following 25 hours and 23 minutes of deliberation.
Rodgers, 20, Dunk, 21, Barker, 21, and former team-mate Cook, 21, were alleged to have assaulted a 19-year-old woman in a Brighton hotel room in July 2011.