 Nyora kupfuurira kweiyi ndima - Muna Ndira 2008, Mensah akashevedzwa kuchikwata cheGhana cheAfrica Cup of Nations. Pamberi pekutanga kwemutambo, akatsiva Stephen Appiah semutungamiriri. Akatamba mutambo wake wekutanga wemutambo, achitanga mutambo, mukukunda 2-1 vachipesana neGuinea musi wa 21 Ndira 2008. Mensah akabva abatsira divi kufambira mberi kusvika padanho rekurova mushure mekuchengetedza machira maviri akachena vachipesana neNambia neMorocco. Musi wa 3 Kukadzi 2008, Mensah akaburitswa mumutambo we2008 Africa Cup of Nations quarter-fainari vachipesana neNigeria nekuda kwehunyanzvi hwehunyanzvi vachirwisa Peter Odemwingie, sezvo Ghana zvisinei yakakunda mutambo 21 nezvibodzwa kubva kuna Michael Essien uye mukundi akazotevera naJunior Agogo. Akadzokera kuchikwata chekutanga chakatarisana neIvory Coast mumutambo wechitatu, achibatsira Ghana kukunda 4-2. 