There has seldom been a more important game in Springbok rugby history than tomorrow's Rugby World Cup clash against Samoa at Villa Park. The two nations have met in encounters before, none more so than in the 1995 World Cup quarterfinal at Ellis Park. Back then there was always going to be one winner. The lines are not so clear any more.Japan, by beating the Springboks 34-32 in Brighton last week, turned the rugby world on its head. Samoa believe they can beat the Boks. Why shouldn't they?South Africa have lost four out of five Tests this year so far.Samoa are so buoyed by what they've witnessed that they've loaded their bench with players who would normally start.They think the Boks are a side that wilts in the final quarter.Flyhalf Tusi Pisi was expected to start, but he is lurking on the bench. So is behemoth prop Census Johnson.It's a clever piece of coaching by Stephen Betham. It will create confusion in the Boks' planning.Assistant coach Johann van Graan talked Pisi up this week. So did fullback Willie le Roux and flyhalf Handré Pollard.But suddenly they're facing Mike Stanley and not Pisi. Cue late nights for the Bok technical staff.South Africa have "lost" the second half in four of their five Tests this year .More alarmingly, the Boks have failed to score any points in the final quarter of matches against Australia, New Zealand and Argentina.But Betham's tactics will only be successful if the Samoans can match the Boks in the early part of the match."They are going to attack us right from the start," he said."The first 15 minutes will be crucial. We have got to man up in that first 15 minutes because if we shy out in any way then it is going to be a long day at the office."We are expecting a fired-up South African side," Betham said.Bok coach Heyneke Meyer knows that a first-ever loss to Samoa would mean the end of his World Cup campaign and probably of his tenure, too.The teamsSouth Africa15-Willie le Roux, 14-JP Pietersen, 13-Jean de Villiers (captain), 12-Damian de Allende, 11-Bryan Habana, 10-Handré Pollard, 9-Fourie du Preez, 8-Duane Vermeulen, 7-Schalk Burger, 6-Francois Louw, 5-Victor Matfield, 4-Eben Etzebeth, 3-Jannie du Plessis, 2-Adriaan Strauss, 1-Beast Mtawarira. Substitutes:16-Schalk Brits, 17-Trevor Nyakane, 18-Frans Malherbe, 19-Lood de Jager, 20-Siya Kolisi, 21-Ruan Pienaar, 22-Pat Lambie, 23-Jesse KrielSamoa1-Sakaria Taulafo, 2-Motu Matu'u, 3-Anthony Perenise, 4-Teofilo Paulo, 5-Iosefa Tekori, 6- TJ Ioane, 7-Jack Lam, 8-Ofisa Treviranus (captain), 9-Kahn Fotuali'i, 10-Mike Stanley, 11-Alesana Tuilagi, 12-Rey Lee-Lo, 13-Paul Perez, 14-Ken Pisi 15-Tim Nanai-WilliamsSubstitutes: 16-Ole Avei, 17-Viliamu Afatia, 18-Census Johnston, 19-Faifili Levave, 20-Vavae Tuilagi, 21-Vavao Afemai, 22-Tusi Pisi, 23-George Pisi..