The Leopards sprinted to a 13-5 lead after five minutes and never relinquished it. They have now won all three encounters this season against the Towers, following an 82-80 victory over the Budweiser League champions in October and last week's 93-92 first-leg cup victory.
Successive three-pointers from John White, who top-scored with 28 points, and Eric Burks pushed the Leopards to a 65-54 advantage before Tony Windless inspired a 10-0 Towers reply which cut the lead to 70-68 with one minute to play.
Sheffield Sharks, last season's beaten finalists, lead Newcastle Eagles 91-80 from the first leg of their semi-final.
The Leicester City Riders coach, Bob Donewald, lost his temper but Chester Jets kept their heads to score five free-throws with one second on the clock in their 7-Up Trophy game at the Granby Halls to beat the home side 104-100 and guarantee their place in the quarter-finals.Reuse content