Crystal Palace boss Patrick Vieira  is tightlipped on the injury situation of his Ghanaian striker Jordan Ayew and two of his African teammates in their 3-2 defeat  to West Ham on Saturday.

Jordan Ayew, Cheikhou Kouyate and Wilfried Zaha have all been named in the provisional squads of their respective country but Kouyate and Zaha were absent for the West Ham game while Ayew was heavily limping after the game.

Vieira said the first two were "not available" to play, adding "no comment" when asked about their Afcon chances.

When questioned by BBC Sport about Ayew's possible injury, he said: "I don't know, I haven't spoken to the doctor yet."

The 24-team Africa Cup of Nations begins on 9 January and will feature a host of Premier League and Europe-based stars.

English top-flight teams do not have to release players until 3 January.

Kouyate was named in the Senegal squad on Friday while Zaha was included by Ivory Coast and Ayew is part of a provisional list announced by Ghana.

Zaha had been expected to return from suspension against West Ham while Kouyate started Palace's win over Norwich on Tuesday.

Ayew played the closing minutes against West Ham with a pronounced limp as the home side had used all three of their substitutes.