Novak Djokovic came through a tricky test against Alex Michelsen at the Shanghai Masters to win his first match on the ATP Tour since a shock third-round exit at the US Open in August.

The 37-year-old Serb lost the opening three games against America’s world number 43, but bounced back to take the first set on a tie-break.

Djokovic then stumbled with victory in sight, forced into another tie-break after letting a 4-1 lead slip in the second set, before finally seeing off 20-year-old Michelsen 7-6 (7-3) 7-6 (11-9).

The fourth-seed joins the ATP Tour’s top two players, Jannik Sinner and Carlos Alcaraz, in the third round following their wins earlier on Saturday.