Chris Vaughan put the Reds ahead in the first half, finishing a counterattack before Kyle Baldock added the second with a tap in at the back post.

Knights almost pulled a goal back after the restart when Anton La Palombara's half-volley hit the upright and Xuechen Zhang's follow-up came back off the crossbar.

But it was Ulverstone that got the only goal of the second half, when Josh Laing capitalised on a defensive error to send a shot under the keeper from the top of the box.

Knights' day went for bad to worse when they were reduced to 10 men after Zac Van Asch got involved in a push-and-shove between two players and was red-carded for violent conduct.