Perth - South Africa's Kevin Anderson has defeated American John Isner 7-6 (7/0), 7-6 (7/5) to take their Hopman Cup encounter to a deciding mixed doubles tie.
Venus Williams, playing her first match since winning the Luxembourg title in October, defeated South Africa's Chanelle Scheepers 4-6, 6-2, 6-3 earlier on Sunday to give the United States a 1-0 lead.
In the second match Sunday, the French combination of Jo-Wilfried Tsonga and Mathilde Johansson will face Spain's Fernando Verdasco and Anabel Medina Garrigues. Spain won their opening match on Saturday over South Africa.