The Sydney Kings are on the cusp of claiming their first NBL championship in 17 years following a tight 90-86 win over Tasmania JackJumpers in game two in Hobart.

Leading 87-86 with less than 10 seconds on the clock, the Kings iced the win when Dejan Vasiljevic landed a three-pointer.

The Kings, who last won the NBL title in the 2004/05 season, can wrap up the grand final series with victory in game three, which will be played in Sydney on Wednesday evening.

They won the opening game of the best-of-five series at home on Friday night, 95-78.

The Kings, without competition MVP Jaylen Adams who suffered a hamstring injury in game one, came back from a 10-point first-quarter deficit on Sunday afternoon.

Their captain, Xavier Cooks (20 points), stood up late, with 11 points in a see-sawing fourth quarter.

JackJumpers' American guard Josh Adams, who had a game-high 36 points, nailed two three-pointers under pressure late to keep his side within touching distance, before Vasiljevic (20 points) sealed the win for the visitors.

Cooks picked up an equal game-high 10 rebounds and two assists in a stand-out performance.

Jarell Martin shot at 80 per cent from the field and also picked up 20 points for the Kings.

In front of a capacity crowd of 4,865, Adams started on fire for the JackJumpers, shrugging off a glancing blow to his arm to post 10 points for the opening quarter.

The JackJumpers made the most of 10 trips to the free throw line, picking up eight points to take a 27-17 lead at the first break.

Vasiljevic came to life as the Kings surged back into the contest with a run of 14 points early in the second period, before the JackJumpers' Jarrad Weeks hit eight points for 48-44 lead at half-time.

The JackJumpers took a 70-68 lead into the final quarter.

Kings coach Chase Buford lost his temper over a call in the third quarter, appearing to put a dint in courtside signage with a kick.

AAP/ABC