Senegal Football Federation president Augustin Senghor accused the club of a "lack of respect" over Sakho's withdrawal and said he would consult FIFA and the Football Association in a bid to prevent the player from appearing for West Ham during the tournament.
West Ham have since sent Senegal independent medical reports, as well as the club's own examinations, to prove the extent of the injury.
"We've been in constant contact with the Senegal federation," said McDonald
"There's no way he can fly, he's obviously injured and he's going to miss the Africa Nations Cup because of his injury and we're going to miss him because he's injured.
"We've been respectful, we've given them information and kept in constant contact with them
He's injured.
"We've asked them to come across and assess him
We've had independent scans done and scans from the club.
"We're not trying to stop anyone from going to represent their country."
Source : PA
Source: PA