Cika wannan jumla:
Wasannin Olympics na 2012 a London, Keizer da van Iersel sun yi gasa a wasanni bakwai na Duniya. Sun sami lambar yabo a biyu daga cikinsu, sun lashe tagulla a $ 300K Beijing Grand Slam, sannan azurfa a $ 300K Gstaad Grand Slam. Sun sami nasara a kan manyan kungiyoyi ciki har da kungiyar kasar Sin ta Xue Chen da Zhang Xi, da kungiyar Amurka ta Kessy da Ross.