Germany Formula One - F1 - German Grand Prix 2016 - Hockenheimring, Germany - 31/7/16 - Mercedes' Lewis Hamilton celebrates after winning the race. REUTERS/Ralph Orlowski

Britain Tennis - Wimbledon - All England Lawn Tennis & Croquet Club, Wimbledon, England - 8/7/16 Switzerland's Roger Federer during a press conference after losing his semi final match to Canada's Milos Raonic REUTERS/Gary Hershorn/Pool

Britain Tennis - Wimbledon - All England Lawn Tennis & Croquet Club, Wimbledon, England - 8/7/16 Switzerland's Roger Federer during a press conference after losing his semi final match to Canada's Milos Raonic REUTERS/Gary Hershorn/Pool

Welding robots are pictured in a Golf VII production line at the plant of German carmaker Volkswagen in Wolfsburg, Germany May 20, 2016. REUTERS/Fabian Bimmer/File Photo

Germany Formula One - F1 - German Grand Prix 2016 - Hockenheimring, Germany - 31/7/16 - Mercedes' Lewis Hamilton celebrates after winning the race. REUTERS/Ralph Orlowski

Emblems of VW Golf VII car are pictured in a production line at the plant of German carmaker Volkswagen in Wolfsburg, February 25, 2013. REUTERS/Fabian Bimmer/File Photo

2016 Rio Olympics - Golf - Final - Men's Individual Stroke Play - Olympic Golf Course - Rio de Janeiro, Brazil - 14/08/2016. Justin Rose (GBR) of Britain celebrates his gold medal win in the men's Olympic golf compeititon. REUTERS/Andrew Boyers

2016 Rio Olympics - Golf - Final - Men's Individual Stroke Play - Olympic Golf Course - Rio de Janeiro, Brazil - 14/08/2016. Justin Rose (GBR) of Britain celebrates his gold medal win in the men's Olympic golf compeititon. REUTERS/Andrew Boyers