Visiting Coast Stima hit hosts Nairobi City Stars 3-1 at Camp Toyoyo in an early round 24 Betika Super League kick off on Saturday 8 February 2020.
Two early goals inside the first 18 minutes handed the hosts a healthy cushion they protected to the breather.
A penalty by Kassim Mohammed Adzai eight minutes into the second half improved the scores to 3-0.
City Stars got their consolation in the dying minutes of the game when defender Salim Abdalla headed home off a free kick by skipper Anthony Muki Kimani that was headed his way by Coast Stima defender Kevin Washe.
Right winger Okumu, arguably the man of the match, was a thorn to the City Stars back line as he scored once and set up another two.
In the 12th minute, he cut in from the right channel and at the edge of the box, whacked in a left footer to the far post for the opening goal.
Six minutes later he was at it again as he raced down his flank, and after a one-two with a team mate, he sliced in a cross that Ombija clipped in with a riser for his 12th goal of the season.
Eight minutes into the second half it is Okumu that drove into the box after leaving behind his markers only to be clipped by City Stars keeper Levis Opiyo for a penalty that Kassim sent home.
The win for Coast Stima, who went down 2-1 to visiting City Stars at Mbaraki in the third week of September 2019 during the first leg, was an apt revenge.
Following the win, Coast Stima shoots to the 39-point mark and within three points of Nairobi Stima moving from fifth to fourth place and above Vihiga United on goal difference. Nairobi Stima are away to Fortune Sacco on Saturday evening.
City Stars still stays top with 55 points with a ten-point cover over Bidco United who have a game in hand against Muranga Seal on Sunday in Thika.
Nairobi City Stars: 23. Levis Opiyo, 8. Calvins Masawa, 4. Salim Abdalla, 22. Wycliffe Otieno, 8. Edwin Buliba, 10. Peter Opiyo, 30. Antony Kimani (Captain), 29. Ebrima Sanneh, 8. Jimmy Bageya (11. Davis Agesa), 32. Ezekiel Odera (21. Oliver Maloba), 27. Azizi Okaka (3. Charles Otieno-25)
Subs: 28. Kevin Okumu, 16. Jacob Osano, 2. Elvis Ojiambo, 16. Vincent Otieno
Coach: Sanjin Alagic
Coast Stima: 29. Brandon Nathan, 5. Hawkins Ademba, 15. Kevin Washe, 21. Khamis Tole, 19. Hassan Iddi, 3. Kassim Mohammed Adzai, 7. Khamis Abudu, 12. Dennis Magige, 10. Dominic Waithaka, 24. Eric Ombija, 11. Rodgers Okumu
Subs: Godfrey Okongo, 14. Clinton Ochieng, 4. Davis Shikala, 2. Herit Atariza, 6. Jacob Mshiri, 9. Lucky Eme, 16. Lucky Kaingu
Coach: Paul Ogai