Kammala jumla mai zuwa: Matsayi na bakwai a gwaje-gwajen Kenya na 2011 ya nuna cewa ba a zaɓe shi ba don taron duniya, amma takaddama tsakanin Leonard Komon da Athletics Kenya sun ga an tsara Tanui a matsayin mai maye gurbin marigayi. Ya ci gaba da kammala
2011 IAAF World Cross Country Championships a matsayin mafi kyawun wasan kasarsa ta hanyar daukar lambar azurfa, da dakika biyu a bayan wanda ya lashe tseren Imane Merga. Tanui ya kuma jagoranci 'yan Kenya zuwa lambar zinare ta kungiya. Matsayi na uku a taron Trofeo Alàsport a bayan Merga da Caleb Ndiku ya kawo ƙarshen lokacinsa na tsere. Ya gudu jerin mafi kyau a waccan shekarar da ya fara da mita 10,000 na minti 26:50.63 don matsayi na huɗu a Prefontaine Classic, lokaci na 13:04.65 min don mita 5000 a Barcelona sannan kuma mafi kyawun mita 3000 na minti 7:50.88 a Arzana. A matsayin daya daga cikin 'yan Kenya mafi sauri sama da mita 10,000 a wannan shekarar, an zaba shi don yin gasa a wannan taron a Gasar Cin Kofin Duniya ta 2011. Koyaya, ya gudu minti ɗaya a hankali fiye da mafi kyawun lokacinsa a wasan karshe kuma ya gama na tara a duka.