Pedzisa mutsara unotevera: Ser-Od akatanga kutora chikamu mumakwikwi akareba muna 2002. Akaita kutanga kwake kwenyika yose pa
2002 IAAF World Half Marathon Championships uye akasimudza chinhambwe kuenda kumarathon pa2003 World Championships muAthletics, kwaakauya 63rd aine nguva yake yakanakisisa ye2:26:39 maawa. Akanga ari wegumi nembiri paHong Kong Marathon ya2004, wechitatu weAsia kupedzisa mumunda weAfrica. Akaita mutambo wake wekutanga weOlympic gore iroro kumaOlympics a2004 muAthens. Akanga ari mumwe wevaMongolia vaviri chete kuti vakwikwidze mumakwikwi emitambo, pamwe chete nemukadzi wemarathon Luvsanlkhündegiin Otgonbayar. Ser-Od akauya wechi75 pakupedzisira nenguva ye2:33:24 maawa, anenge maminitsi makumi maviri kumashure kwemukundi.