2011 Hopman Cup of play. Eight teams competed for the title, with two round robin groups of four, from which the top team of each group progressed to the final. Spain were the 2010 champions but were not invited to defend their title. In the final the United States of America team of Bethanie Mattek-Sands and John Isner defeated Belgium's Justine Henin and Ruben Bemelmans 2–1. This was the USA's sixth Hopman Cup title. The 2011 Hyundai Hopman Cup is an invitational tennis tournament and is also known as the Official Mixed Teams Championships of the ITF. The 2011 cup has prize money
Hopman Cup consists of one male player and one female player. Each match-up between two teams at the championships consists of: The eight competing teams are separated into two groups of four (with two teams being seeded) and face-off against each of the other three teams in their group in a round-robin format. These seedings ensure that each group has approximately similar strength. The top team in each group then meet in a final to decide the champions. If a player is injured then a player of a lower ranking of that nation may be the substitute. The 2014 Hopman Cup Tournament