Robertson reached the last 16 of a ranking event for the second time by beating Dechawat Poomjaeng 4–0 and Martin O'Donnell 4–3 at the Riga Masters and was defeated 4–1 by John Astley. He also recorded the event's high break of 138. Robertson was thrashed 5–0 by Shaun Murphy in the second round of the World Open after he had eliminated Wang Yuchen 5–1 in the opener. He won through to the third round of both the UK Championship and Welsh Open, but failed to pick up a frame in losses to Oliver Lines and Scott Donaldson respectively.