Watson (45) and Haddin (32) took the team closer to Lions’ 137 for nine while Steven Smith (25 not out) got the Australian unit over the line. Watson (2-25), Josh Hazlewood (2-18) and Mitchell Starc (3-19) did the job with the ball with Gulam Bodi (61) being the stand out batsman for Lions.
It was Sydney’s third win in as many matches while Lions suffered their first loss of the competition.
Left-arm spinner Aaron Phangiso (3-14) was the pick of the bowlers for Lions.
Earlier, Bodi took Lions to a fighting score with support from Neil McKenzie (17) and Jean Symes (23).