More than 20 positive tests for coronavirus at several clubs led to the postponement or cancellation of league matches in Morocco and Egypt at the weekend.
Three matchday 22 fixtures were called off in the Moroccan Botola Pro 1 with Ittihad Tangier worst affected as 23 of the staff tested positive.
Wydad Casablanca and Rapide Oued Zem were also hit by a COVID-19 outbreak and could not play.
Egyptian club Al Masry said 22 of their staff tested positive and the Port Said outfit did not turn up for a fixture against Ismaily.
With runaway leaders Al Ahly set for a record-extending 42nd title, arch rivals Zamalek improved their chances of coming second thanks to a 1-0 win over lowly Misr Lel Makkasa.
Forward Hossam Ashraf scored in the fourth minute of stoppage time to secure three points for Zamalek, whose rivalry with fellow Cairo club Ahly dates back to 1911.
Third-place Pyramids FC had to come from two goals behind to draw 2-2 against relegation-threatened El Gaish with Tunisian Amor Layouni levelling eight minutes from time.
Ahly have 53 points, Zamalek 38, Pyramids 36 and Al Mokawloon Al Arab 34 in the strongest league in the continent judged by Confederation of African Football (CAF) titles.
Raja Casablanca won 2-0 at lowly Hassania Agadir and extended an unbeaten run to six matches since play resumed last month after a suspension since March due to the coronavirus pandemic.
The leaders needed just three minutes to break the deadlock in southern Morocco with Soufiane Rahimi scoring and Hamid Ahaddad added a second goal soon after half-time.
Raja have won four matches and drawn two since the resumption, and the 14-point haul has propelled them to the top of the table with nine rounds remaining.
The three-time African champions have 42 points, arch-rivals Wydad Casablanca 40, Renaissance Berkane 39 and FUS Rabat and Mouloudia Oujda 36 each.
Leaders Esperance snatched a 1-1 draw at Etoile Sahel in the biggest matchday 20 attraction of the Tunisian Ligue Professionnelle 1.
Karim Aribi gave fourth-place Etoile a 19th-minute lead they held until the third minute of additional time when Taha Yassine Khenissi equalised.
Ivorian Chris Kouakou netted after 14 minutes to earn second-place CS Sfaxien a 1-0 home victory over mid-table Soliman.
Esperance have 50 points with six rounds remaining as they chase a fourth straight title, Sfaxien 40, Monastir 39, Etoile 34 and Club Africain 33.
Mlandege have been crowned champions in the semi-autonomous region of Tanzania, garnering 68 points from 30 matches to finish one point above Zimamoto.
It was the seventh title for the club, but the first since 2002, and success qualifies them for a maiden CAF Champions League appearance next season.
Zimamoto trounced Kapinga 4-0 in the final round while JKU came third after drawing 1-1 with Malindi.
Defending champions KMKM had to settle for fourth spot, 12 points adrift of Mlandege, after a 2-2 draw against Mafunzo.