Instead, a random draw will decide which team goes through to play Ghana on Sunday.
All four teams could have faced the drawing of lots had there been no winners from the group’s final two games.
The last time lots were drawn at the Cup of Nations was in 1988, when Algeria went through at the expense of Ivory Coast.
Maiga, on loan at Metz from West Ham, headed in from the back post early in the second half, but Mali could not find a second goal despite a succession of opportunities.
Ten of the 24 Cup of Nations games played to date at this tournament have now ended 1-1.