By Mohamed Fajah Barrie BBC Sport, Freetown

Mohamed Kallon will play for Sierra Leone despite being suspended in Italy

Mohamed Kallon will lead Sierra Leone against Congo in the return leg of their 2006 Nations Cup and World Cup qualifier on Saturday, despite failing a drug test in Italy.

The Inter Milan striker tested positive for the banned substance Nandrolone after a league match against Udinese on 27 September.

Kallon is currently suspended from the Serie A campaign but has not been sanctioned by world governing body Fifa.

Sierra Leone must overcome a 1-0 deficit against Congo in Freetown or face almost three years without competitive international football.

But Kallon is confident that confident that they will reach the group stage of the qualifiers.

"It's impossible for us to lose," he told the BBC Sport website.

Kallon, who is expecting the hear the results of the test on his 'B' sample very soon, denied being guilty of using a performance-enhancing substance.

"It is just impossible for me to take a banned drug, I believe that I am innocent and I will come out clean at the end.

"I did not take banned drugs when I was playing for smaller clubs like Vicenza, Cagliari and Reggina.

"So why should I take it now when I am playing for Inter Milan?," Kallon questioned.

He demanded that Coni verify that the sample tested was the one he provided during the Udinese game.

"I am asking that the Italian Olympic Committee carry out a DNA test on the urine, as they might have made a mistake," he said.