Holders Esperance of Tunisia drew 0-0 with DR Congo outfit TP Mazembe in the first leg of their Champions League semi-final tie on Sunday 7 October 2012.
Mazembe finished with 10 players on the pitch after Stopila Sunzu was sent off in stoppage time for a second bookable offence.
The goalless affair in Lubumbashi sets up a potentially explosive second leg in Tunisia in a fortnight where on the evidence of the first match, will be as hard a game as any in the world.
The winners will play either Sunshine Stars of Nigeria or Al Ahly of Egypt in the final.
Won the last three
Sunshine and Ahly produced a 3-3 draw in Nigeria on Saturday, making the Cairo Red Devils favourites to go through.
TP Mazembe and Esperance have shared the last three Champions League titles between themselves, with the Congolese side winning in 2009 and 2010.
They were denied a chance to secure a hat-trick of titles when they were disqualified from the competition last season after fielding an improperly registered player.