Champville survived a late scare to beat Mouttahed 91-88 in Game 1 of their quarterfinal series at Dik El Mehdi Saturday.
Champville dominated the ealry goings and were ahead 46-29 at halftime.
But Mouttahed have one of the deadliest offensive duo in the league in Dewarick Spencer and Perry Petty, with the latter hitting some big-time shots to claw the deficit to only three heading into the fourth.
Although Champville re-opened a nine-point gap in the fourth thanks to back-to-back triples from Nadim Souaid and Nikoloz Tskitishvili, the visitors refused to lie down and led by one point with one minute left. But Sims made a crucial basketball with 40 seconds to go, before he netted two free throws, as Champville secured a 1-0 lead in the best-of-five series.
Sims top scored for the winners with 30 points and six rebounds, while Tskitishvili and Souaid added 20 points each. Bassel Bawji notched a double-double with 11 points and 13 rebounds, and Rony Fahed had eight points and six assists.
Perry led the scoring for the Tripoli side with 30 points, while Spencer added 22 points and Charles Tabet provided another double-double with 12 points and 10 rebounds.
Game two takes place in Tripoli next Saturday.
Elsewhere, Riyadi dispatched Hoops 108-74 in Game 1 at Manara.
The trio of Fadi El-Khatib, Jeremiah Massey and Ahmad Ibrahim had 20 points each for the hosts, while Tryone Nelson led the scoring for Hoops with 24 points and 12 rebounds.