to the third round and thus reached a ranking of No. 79 after the tournament. Young represented the United States in a first round Davis Cup tie against Great Britain. He played one rubber and lost to Andy Murray in straight sets on clay inside Petco Park. Young made it to the third round of the French Open, eventually losing in five sets to Guillermo García-López. Young made it to the semifinals of the Citi Open losing to the top ranked Canadian Milos Raonic. 2015: Fourth round of a major Young reached the final in the Delray Beach Open, his first ATP singles final since 2011, but lost in straight sets to Ivo Karlović. In March 2015 Young played Andy Murray in a Davis Cup tie and lost in four sets, as well as losing to Murray again later in March in Miami. At the 2015 US Open, Young became a darling of the American fans en route to matching his 2011 performance by reaching the round of 16. He notched dramatic come-from-behind victories against his first three opponents, triumphing in the third round via a thrilling five-set victory over 22nd-ranked Viktor Troicki. He then lost to fifth-seeded Stan Wawrinka in four sets, thus failing to advance to the quarterfinal stage, which would have marked a new career-best performance at a Grand Slam major. Prior to his final match of the tournament, some of Young's shoes reportedly went missing from his locker inside the Billie Jean King National Tennis Center. 2016–18: Early success, FO doubles final 2016 was an average year for Young with his best performance coming at the Hall of Fame Open with a semifinal appearance. In early 2017, Young saw major success. Semifinal appearances at the Delray Beach Open and the Memphis Open were followed up by 4th round appearances at Indian Wells and the Miami Open. These results pushed his ranking to No. 42. At the 2017 French Open, Young partnered with Santiago Gonzalez resulting in a run to the finals. He also registered 100 career singles victories in 2017. At the 2018 Australian Open, he was the first round opponent for former world no. 1 Novak Djokovic, despite fighting hard he was defeated in straight sets. The 2018 US Open was his last grand slam to date. He lost in the first round to eventual finalist Juan Martín del Potro in straight sets. 2019–22: Dip