Andy Murray and Naomi Broady set up a winner-takes-all finale in the Battle of the Brits after beating Kyle Edmund and Emma Raducanu in the penultimate match of the week-long tournament.
Union Jacks pair Murray and Broady won 6-3 7-6 (7-5) to stop the British Bulldogs sealing victory in Roehampton.
Bulldogs now lead 58-56 going into the final match of the first-to-60 event.
Jacks' Jamie Murray and Heather Watson take on Bulldogs' Joe Salisbury and Harriet Dart for the final five points.
The Bulldogs closed in on victory after singles wins for Maia Lumsden, Raducanu, Liam Broady, Edmund and Harriet Dart, before Heather Watson and Dan Evans kept the Jacks in touch.