Rubuta ci gaba don wannan sakin layi - Koivumaki ya cancanci shiga cikin rukunin mata masu nauyin nauyi (57 kg) a Wasannin Olympics na 2008 a Beijing, ta hanyar sanya na biyar daga Gasar Judo ta Duniya ta 2007
a birnin Rio de Janeiro na ƙasar Brazil. Ta isa kawai a zagaye na biyu na farko, inda ta yi hasarar yukos biyu ga Xu Yan na kasar Sin. Saboda abokin hamayyarta ya ci gaba zuwa wasan kusa da na karshe, Koivumaki ta ba da wata dama don lambar tagulla ta hanyar kayar da Lila Latrous ta Algeria, tare da koka da zinare, a wasan farko na sakewa. Abin takaici, ta gama ne kawai a matsayi na tara, bayan da ta yi rashin nasara a karo na biyu da Aiko Sato na Japan, wanda ya yi nasarar zira kwallaye guda biyu da yoko shiho gatame (mat bakwai), a cikin minti uku.