Defending champions Cameroon remain top of Group F after a goalless draw with Ghana at the Africa Cup of Nations.
The five-time winners, who beat Ghana 2-0 in the 2017 semi-finals, went closest in the first half as Christian Bassogog was denied by Richard Ofori.
But Ghana almost won it late on when substitute Owusu Kwabena struck the crossbar and Andrew Yiadom went close.
Clarence Seedorf’s side are two points clear at the top of the group before Benin play Guinea-Bissau (21:00 BST).
With four of the six third-placed teams qualifying for the knockout stage, Cameroon are well placed to reach the last 16 after starting their defence with a 2-0 win over Guinea-Bissau while Ghana were held to a 2-2 draw with Benin in their opener.
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Ghana started better in a first half of few chances in Ismailia, with defender Kasim Nuhu shooting over following a corner before Christian Atsu sent a long-range strike just wide, but the Newcastle winger was injured in the process and replaced by Samuel Owusu, who then dragged a shot well wide.
Cameroon almost broke the deadlock five minutes before half-time after Ghana’s Chelsea left-back Baba Rahman was caught in possession by Bassogog just inside his own half.
Bassogog, who was named player of the tournament in 2017, played the ball down the right for Karl Toko Ekambi before racing on to his cut-back, but goalkeeper Ofori leapt across his goal to make a fine save.
Ghana’s Mubarak Wakaso twice fired wide after the interval while Bassogog’s goal-bound volley struck Jonathan Mensah on his chest.
And Ghana almost won it as Kwabena fired against the top of the crossbar after cutting out a poor pass by Cameroon defender Jean-Armel Kana-Biyik, while Reading full-back Yiadom had a shot saved by Ofori.
Analysis
BBC Sport Africa’s Janine Antony
This was a game with no goals and no risks taken. It was stop-start without any flow whatsoever – even the fans looked bored.
For Cameroon, with four points after two games, it should be enough to reach the knockout phase.
But Ghana will come in for stick. They’ve been to the quarter-finals at the past eight Afcons and now they have to depend on their final group game against Guinea-Bissau.
Live Text
Match ends, Cameroon 0, Ghana 0.
Second Half ends, Cameroon 0, Ghana 0.
Attempt missed. Owusu Kwabena (Ghana) right footed shot from the left side of the six yard box is close, but misses to the left. Assisted by Thomas Partey with a cross following a corner.
Delay over. They are ready to continue.
Delay in match because of an injury Jean-Armel Kana-Biyik (Cameroon).
Corner, Ghana. Conceded by Jean-Armel Kana-Biyik.
Foul by Michael Ngadeu-Ngadjui (Cameroon).
Asamoah Gyan (Ghana) wins a free kick in the defensive half.
Attempt missed. Thomas Partey (Ghana) right footed shot from outside the box is high and wide to the right. Assisted by Owusu Kwabena.
Attempt saved. Andy Yiadom (Ghana) left footed shot from the centre of the box is saved in the bottom right corner. Assisted by Jordan Ayew.
Owusu Kwabena (Ghana) hits the bar with a right footed shot from outside the box following a fast break.
Substitution, Ghana. Owusu Kwabena replaces André Ayew.
Attempt blocked. Mubarak Wakaso (Ghana) left footed shot from outside the box is blocked.
Foul by Pierre Kunde (Cameroon).
Samuel Kwame Owusu (Ghana) wins a free kick in the attacking half.
Substitution, Cameroon. Pierre Kunde replaces André-Frank Zambo Anguissa.
Offside, Cameroon. Eric Maxim Choupo-Moting tries a through ball, but Christian Bassogog is caught offside.
Attempt missed. Ambroise Oyongo (Cameroon) left footed shot from outside the box misses to the right. Assisted by Georges Mandjeck.
Substitution, Ghana. Asamoah Gyan replaces Kwadwo Asamoah.
Ambroise Oyongo (Cameroon) wins a free kick in the defensive half.
Foul by Samuel Kwame Owusu (Ghana).
Attempt blocked. Christian Bassogog (Cameroon) left footed shot from the centre of the box is blocked.
Christian Bassogog (Cameroon) wins a free kick on the right wing.
Foul by Abdul Rahman Baba (Ghana).
Substitution, Cameroon. Stéphane Bahoken replaces Karl Toko Ekambi.
Substitution, Cameroon. Eric Maxim Choupo-Moting replaces Gaëtan Bong.
Ambroise Oyongo (Cameroon) wins a free kick in the defensive half.
Foul by Jordan Ayew (Ghana).
Foul by Christian Bassogog (Cameroon).
Kwadwo Asamoah (Ghana) wins a free kick on the left wing.
Corner, Ghana. Conceded by Collins Fai.
Foul by André-Frank Zambo Anguissa (Cameroon).
Abdul Rahman Baba (Ghana) wins a free kick in the defensive half.
Kasim Adams (Ghana) is shown the yellow card for a bad foul.
Karl Toko Ekambi (Cameroon) wins a free kick in the defensive half.
Foul by Kasim Adams (Ghana).
Attempt blocked. Samuel Kwame Owusu (Ghana) left footed shot from the right side of the box is blocked. Assisted by Thomas Partey.
Offside, Ghana. Thomas Partey tries a through ball, but Kasim Adams is caught offside.
Foul by André-Frank Zambo Anguissa (Cameroon).
Jordan Ayew (Ghana) wins a free kick in the attacking half.
Africa Cup of Nations: Cameroon stay top of group after Ghana draw