Mezue ahịrịokwu na-esonụ:
Na 2012 Summer Olympics na London, Keizer na van Iersel so na asọmpi asaa nke World Tour. Ha nwetara ihe nrite na abụọ n'ime ha, merie ọla nchara na $300K Beijing Grand Slam, nke ọlaọcha na $300K Gstaad Grand Slam. Ha meriri ndị otu kachasị elu gụnyere ndị otu China nke Xue Chen na Zhang Xi, na ndị otu America nke Kessy na Ross.