Juan Martín del Potro shows incredible sportsmanship, consoling a weeping Almagro who was forced to retire w/ knee injury WATCH: http://www.tennis.com/pro-game/2017/06/nicolas-almagro-tears-crying-juan-martin-del-potro-french-open-2017/66480/

The Spaniard was forced to retire after re-injuring his knee at Roland Garros.