Pierre-Hugues Herbert Pictures
LONDON, ENGLAND - NOVEMBER 16: Pierre-Hugues Herbert and Nicolas Mahut of France shake hands at the net with Marcelo Melo of Brazil and Lukasz Kubot of Poland after their semi-final doubles match during Day Seven of the Nitto ATP World Tour Finals at The O2 Arena on November 16, 2019 in London, England. (Photo by Justin Setterfield/Getty Images)