Manchester City will find out within the next 24 hours whether Yaya and Kolo Toure can play in Sunday's FA Cup third-round encounter with Manchester United at the Etihad Stadium.
The pair are due to report for African Nations Cup duty with the Ivory Coast, but manager Roberto Mancini has requested that they be allowed to miss a team meeting in Paris on Saturday, and the first part of a two-week training camp in Abu Dhabi that begins on Sunday.
"We have asked the Ivory Coast manager because they have a meeting in Paris on Saturday,'' Mancini said. "We have asked whether Kolo and Yaya can stay with us and then they can go to Abu Dhabi. We are waiting for an answer and I expect to know either today or tomorrow.''
Mancini is nervously awaiting an answer because the City manager has warned he may not have enough players to fill his substitutes bench at the weekend.
Gareth Barry is suspended, Owen Hargreaves is not considered fit enough to be involved and Mario Balotelli is troubled by an ankle injury that prevented him playing against both Sunderland and Liverpool.
"We have 17 players,'' said Mancini. "I do not know how it is going to work.''