The mailmen will be hoping to revenge a humiliating defeat at the hands of the league leaders when they face off.
Shield defending champions AFC Leopards will host minnows Mwatate FC in what looks like a free ticket to the quarter-finals.
AFC Leopards progressed after downing Rain Forest 4-0 in the previous round, while the coastal-based side was given a walkover after Ushuru failed to turn up.
Full Draw; Saturday, July 21, 2018; Modern Coast Rangers vs Kariobangi Sharks (Mbaraki Sports Club, 3 pm), Friend Zone vs Riverplate (Kinoru Stadium, 1 pm) and Kenya Police vs Leysa (Kinoru Stadium, 3.15 pm).
Sunday, July 22, 2018; Vihiga United vs Ulinzi Stars (Mumias Complex, 3 pm) and Tusker vs Bungoma Superstars (Kinoru Stadium, 1 pm) and Sofapaka vs Western Stima (Kinoru Stadium, 3.15 pm.
Wednesday July 25, 2018; AFC Leopards vs Mwatate United (Kasarani Stadium*, 2 pm) and Posta Rangers Gor Mahia (Kasarani Stadium*, 4 pm).