Cape Town - Orlando Pirates skipper Lucky Lekgwathi said on Tuesday his side cannot afford to lose two consecutive games against perennial rivals, Kaizer Chiefs. GALLERY: Orlando Pirates fan picturesFORUM: Have any thoughts on who will win? If so, join the debate on Sport24's all-new Forum!The two Soweto giants will lock horns in the much anticipated MTN8 semi-final first leg encounter at the FNB Stadium on Saturday.The Glamour Boys defeated Pirates 1-0 in the Carling Black Label Cup last month courtesy of a Lehlohonolo Majoro strike, but Lekgwathi emphasised that the men in black are committed and willing to earn their fans the bragging rights this time round. “The derby is a match that is part of the history of South Africa - we lost in the Carling Cup but now the demand from everywhere is bigger, Chiefs can't win two matches against us - we will fight,” Lekgwathi told the Orlando Pirates website. “It is not going to be easy once again to defeat Chiefs, who are our biggest rivals, but we have a commitment with all our stakeholders and we will certainly have to be at our best and fight for a win.” Lekgwathi, 37, urged fans to come out in their numbers and rally behind the team as they battle to bring back the glory days to Parktown. “The fans must just come in numbers and support us - tickets will be sold out soon so it becomes important that they get their tickets well in advance just to avoid problems. It will be a nice match but we will do everything to win.” The game promises to be a cracking affair, as both teams are currently on top form. Kick-off is at 15:00.