London 2012 - Australi's Lleyton Hewitt and Samantha Stosur play Andy Murray and Laura Robson of Great Britain in the mixed doubles quarterfinals at Wimbledon.

London 2012 - British mixed doubles partners Andy Murray and Laura Robson discuss tactics during their gold medal match with Victoria Azarenka and Max Mirnyi of Belarus, who went on to triumph at Wimbledon.

London 2012 - Andy Murray of Great Britain serves during the mixed doubles final, won by Belarus.

German skater Maxi Herber practives her jumps in preparation for her performance, with partner Ernst Baier, in the Mixed Doubles Figure Skating Competition at the Winter Olympics in Garmisch-Partenkirchen, Germany, February 1936. Herber and Baier went on to win the gold medal in the event. (Photo by FPG/Getty Images)

The winning teams on the podium during the Medal Ceremony of Equestrian/Jumping Team Mixed Event on Day 4 of the Nanjing 2014 Youth Olympic Games at Nanjing International Exhibition Center, August 20, 2014, Nanjing, China.

German Team competing Luge Doubles Mixed at the 2010 Vancouver Olympic Winter Games. © 2010/GETTY - All rights reserved.

German Team competing Luge Doubles Mixed at the 2010 Vancouver Olympic Winter Games. © 2010/GETTY - All rights reserved.

Austria Team during the Luge Doubles Mixed medal ceremony at the 2010 Vancouver Olympic Winter Games. © 2010/GETTY - All rights reserved.

Latvia Team competing Luge Doubles Mixed at the 2010 Vancouver Olympic Winter Games. © 2010/GETTY - All rights reserved.

Latvia Team competing Luge Doubles Mixed at the 2010 Vancouver Olympic Winter Games. © 2010/KISHIMOTO- All rights reserved.