An elite junior player, James reached the 2010 Roland Garros junior semifinals and Australian Open junior quarterfinals before winning his first ATP World Tour match at the 2012 Brisbane International. The same year he made his Grand Slam debut at the Australian Open and won his first Grand Slam match. James continued his rise by cracking the world top 100 for the first time in 2015.
Following an injury layoff in 2017 James has returned to the top of world tennis, facing off against Marin Cilic, Alexander Zverev and Andy Murray in Gland Slams in 2018. James remains one of the most promising players in Australian tennis and despite being unlucky with injury and tough draws on the comeback trail, James has displayed the ability that took him to that level. He left no doubt that he belongs when he took the first set off Andy Murray at the 2018 US Open.