US player Jack Sock reacts after a point against Austria's Sebastian Ofner during their men's singles second round match on the fourth day of the 2017 Wimbledon Championships at The All England Lawn Tennis Club in Wimbledon, southwest London, on July 6, 2017. / AFP PHOTO / Daniel LEAL-OLIVAS / RESTRICTED TO EDITORIAL USE (Photo credit should read DANIEL LEAL-OLIVAS/AFP/Getty Images)
