John Robert Isner (birthed April 26, 1985) is an American professional tennis player. He has actually been rated as high as No. 8 in men s singles by the Association of Tennis Experts (ATP). Considered among the most effective servers ever before to play on the ATP Tour, Isner attained his career-high singles placing in July 2018 by virtue of his first Masters 1000 crown at the 2018 Miami Open and also a semifinals look at the 2018 Wimbledon Championships. He has additionally twice reached the quarterfinals at the US Open up in 2011 as well as 2018, the latter of which assisted qualify him for his very first ATP Finals look later on that year. He currently has the second-most aces in the background of the ATP Scenic tour, having offered over 13,000 aces. At the 2010 Wimbledon Championships, he played the lengthiest expert tennis suit in background, defeating Nicolas Mahut in an overall of 11 hrs and also 5 minutes, played over the training course of 3 days. Isner currently holds the do...