“However, these two pitches has been adversely affected by combination of wear and tear from the six games played or to be played in each of them and the unstable weather conditions seen lately.
“Consequently, the CAF Executive Committee feels that the eight teams qualified for the quarterfinal stages onwards should be given the opportunity to play on grounds that provide the highest standards, specifically those of Bata and Malabo, to ensure the quality of play remains at the highest possible level.
“This decision has been arrived at after consultation with all parties concerned, inclusive of the Local Organizing Committees and the teams involved.”
Source: kickoff.com