Zak above Jaden? Libbok better than Sexton? The fascinating science behind URC's new rankings

Pop quiz: With the exception of Springbok giants Eben Etzebeth and Siya Kolisi, who is South Africa's best-performing player in the URC over the past 12 months?

Evan Roos, the inaugural edition's Player of the Year? The irrepressible Marcell Coetzee? The dazzling Kurt-Lee Arendse?

Surprisingly, it's the compact Bulls scrumhalf Zak Burger, who currently ranks 13th in the URC's Top100, the tournament's new player ranking system that combines recent performances across the URC, Champions and Challenge Cups and international rugby, applies its StatMaster algorithm and then determines the most valuable players on recent form.