Andre Ayew is disappointed over his inability to play a part in Ghana's must-win 2012 London Olympic Games qualifier in Sudan.

The Olympique Marseille player was called up for today's game in Omdurman but was unable to show up with his French club blocking his release because the fixture is not been played on a Fifa match day.

Andre, however, remains upbeat about the chances of Ghana despite the Black Meteors trailing 1-0 from the first leg.

A 92nd minute goal by substitute Martin Wani Khamees condemned Ghana to the shock defeat and an early exit from the 2012 qualifying competition looms.

"I feel very disappointed not to have been able to join up with the rest of the team in Sudan. It's always my desire to play for the national teams," Andre said on Saturday morning.

"However, I remain hopeful that the squad can overturn the result. I have enough confidence in our coach, David Duncan and the entire squad. I wish my colleagues the very best of luck."

Ghana, who have made six appearances at the Games and took the 1992 bronze medals in Barcelona, need a good win to advance to the last 16 of the qualifying campaign.