One of the most complex current issues in sports can be traced back to a track meet in Germany in 2009, when an unknown 18-year-old from South Africa blew away a field of the best female runners on the planet to win the world title. The teenager was hardly out of breath when she flexed her muscles at the end of it.
What quickly became clear is that sports faced an unprecedented dilemma with the arrival of Caster Semenya.
