According to africanfootball.com, the Super Eagles coach is suffering from a virus infection.
Oliseh has invited 26 players for CHAN tournament in Rwanda and the players will resume training in training in Abuja on Monday, December 14.
A source said: “Oliseh will not come to Nigeria as he is still recovering from illness in Belgium. He will now join the Eagles in South Africa when they begin training camp there.”
Oliseh’s ailment has forced him to receive treatment outside the country and has clearly affected his weight.
Assistant coach Salisu Yusuf is expected to lead the team in the absence of Oliseh as he did in Ouagadougou.