RIO DE JANEIRO, BRAZIL - AUGUST 14: Jack Sock of the United States and Bethanie Mattek-Sands of the United States in action during the mixed doubles gold medal match against Rajeev Ram and Venus Williams of the United States on Day 9 of the Rio 2016 Olympic Games at the Olympic Tennis Centre on August 14, 2016 in Rio de Janeiro, Brazil. (Photo by Clive Brunskill/Getty Images)
USA's Bethanie Mattek-Sands and USA's Jack Sock celebrate a point against USA's Venus Williams and USA's Rajeev Ram during their mixed doubles gold medal tennis match at the Olympic Tennis Centre of the Rio 2016 Olympic Games in Rio de Janeiro on August 14, 2016. / AFP / Luis Acosta (Photo credit should read LUIS ACOSTA/AFP/Getty Images)
USA's gold medallists Bethanie Mattek-Sands and Jack Sock pose on the podium during the medal ceremony for the mixed doubles tennis event at the Olympic Tennis Centre of the Rio 2016 Olympic Games in Rio de Janeiro on August 14, 2016. / AFP / Luis Acosta (Photo credit should read LUIS ACOSTA/AFP/Getty Images)
USA's gold medallists Bethanie Mattek-Sands (C-L) and Jack Sock (C-R) pose on the podium with USA's silver medal winners Venus Williams (L) and Rajeev Ram (2nd-R) and Czech Republic's bronze medallists Lucie Hradecka (2nd-R) and Radek Stepanek (R) during the medal ceremony for the mixed doubles tennis event at the Olympic Tennis Centre of the Rio 2016 Olympic Games in Rio de Janeiro on August 14, 2016. / AFP / Luis Acosta (Photo credit should read LUIS ACOSTA/AFP/Getty Images)
