DOHA: Lekhwiya defeated Muaither 3-1 in their 14th-round tie to extend their stay at the top of the Qatar Stars League standings at the Al Gharafa Stadium on Wednesday.
Nam Tae-Hee (29th minute), Almoez Ali (44th) and Ismail Mohammed (59th) scored for the winners while former Cops striker Alain Dioko pulled one back in the 88th.
Al Sadd too continued their unbeaten streak and kept up the pressure on Lekhwiya by beating strugglers Al Kharaitiyat 1-0.
Defender Ibrahim Majed made the difference when he drilled home a free-kick in the 74th.
Injury-plagued El Jaish suffered another setback to their title hopes when Al Wakrah held them goalless.
Al Gharafa reclaimed the fourth spot with a 2-0 victory over Al Ahli.
Othman Al Yahri (34th) and Mohammed Razzaq (84th) scored for the Cheetahs.