 In October Sugita advanced to the 3rd round in Tokyo; lost in the 1st round in Shanghai; advanced to the 3rd round in Stockholm; at this time ranked #37 in the world, lost in the 1st round in Basel, Switzerland; and lost in the 1st round in Paris.Sugita and Naomi Osaka represented Japan in the mixed-gender 2018 Hopman Cup.He lost his singles match to Roger Federer 6-4, 6-3, but his leaping overhead smash delighted the fans and was included in most compilation clips of early 2018 season highlights.