 Denis Vieru akaberekwa musi wa 10 Kurume 1996 mutambi weJudo wekuMoldova uyo anokwikwidza muchikamu chevarume chehafu-chiedza 66 kg. Akatanga kusimukira mukurumbira mushure mekuhwina menduru yegoridhe kuEuropean U-23 Judo Championships muna 2016, wekutanga weMoldova kuita kudaro kubvira Marcel Trudov muna 2005. Vieru akahwina menduru pane dzinoverengeka dzeIJF Grand Prix uye Grand Slam zviitiko muna 2019, kusanganisira yekutanga yeMoldova Judo Grand Prix menduru yegoridhe kuAntalya Grand Prix, imwe goridhe kuBaku Grand Slam, uye akakunda 2016 European shasha Vazha Margvelashvili kuhwina goridhe kuGrand Slam Paris. Akakundawo Ranto Katsura wekuJapan kuhwina menduru yegoridhe ku2019 Summer Universiade muNaples, kwaaive mutakuri wemureza wenhume yeMoldova pamhemberero yekuvhura, uye akahwina menduru yebronze ku2019 World Judo Championships. Kubva muna Kukadzi 2020, aive pachinzvimbo chechitatu pasi rose muchikamu chevarume chehafu-chiedza. 