South African teams have not covered themselves in glory in the Champions and Challenge Cups this season. Next weekend (January 11-12) presents opportunities for the Stormers, Sharks, Bulls, Lions, and Cheetahs to progress in their respective pools and competitions.All teams have played two matches in their pools and now there is a fortnight of Cup action before the United Rugby Championship resumes.It is the Last Chance Saloon for the winless Stormers and Bulls in the Champions Cup and the Cheetahs in the second-tier competition.After a miserable start in all competitions, the Stormers…