Posted on Oct 10
Nigeria's defender Joseph Yobo (left) is challenged for the ball by Greece's striker Theofanis Gekas during their 2010 World Cup match at Free State Stadium in Mangaung/Bloemfontein. Yobo is a major doubt for his side's decisive 2013 Africa Cup of Nations qualifying match against Liberia on Saturday on account of a knee injury.

Nigeria captain Joseph Yobo is a major doubt for his side's decisive 2013 Africa Cup of Nations qualifying match against Liberia on Saturday on account of a knee injury.

"Yobo is most likely to miss Saturday's game after he suffered a knee injury while in action for his club, Fenerbache," said Ben Alaiya, press officer for the Nigerian national team.

"He has a less than 30 percent chance of playing against Liberia now."

Yobo played in last month's 2-2 first-leg draw between the sides in Liberia but was replaced by Efe Ambrose in the second half.

Injury has already prevented the experienced central defender from playing in a Nations Cup qualifying play-off against Rwanda and 2014 World Cup qualifiers against Malawi and Namibia earlier this year.