 Nyorera kupfuurira kweiyi ndima - Muna Chikunguru 2008, Dementieva akasvika kumasemifainari ake ekutanga paWimbledon Championships asi akarasikirwa nemaseti akaenzana kumukwikwidzi akazova shasha, Venus Williams. Akadzokera shure nekuhwina menduru yegoridhe mu singles kumaOlympics eBeijing muna 2008, vachikunda mumwe wavo, Dinara Safina mumutambo wokupedzisira. Gare gare gore iroro, akasvika kwake wechipiri akatevedzana chikuru Slam Semi-fainari pa US Open asi akarasikirwa akarurama seti kuti pakupedzisira mumhanyi-up, Jelena Janković. Dementieva akapedza gore nekusvika kuma semi fainari eWTA Tour Championships kechipiri mubasa rake kwaakarasikirwa mumaseti matatu kumbeu yechisere, Vera Zvonareva. Dementieva akapedza gore iri ari pachinzvimbo chechina pasi rose, chinoramba chiri chinzvimbo chake chakanakisa kusvika parizvino. Dementieva akatanga mwaka wa2009 nekukunda ASB Classic neMedibank International, achikunda vamwe vake Elena Vesnina naDinara Safina mumakwikwi ekupedzisira asati asvika kwake kwekutanga uye chete semi-fainari kuAustralia Open kwaakarasikirwa nemukwikwidzi wekupedzisira mumaseti akarurama. Somuuyo, Dementieva zvino asvika kumasemi-fainari kana kuti zviri nani mumitambo yose mina yeGrand Slam. Musi waApril 3, 2009, Dementieva akawana basa idzva rakakwirira rakasarudzika reNyika Nhamba 3. Gare gare gore iroro, akasvika kwake yechipiri akatevedzana Semi-fainari pa Wimbledon Championships uye akahwina Rogers Cup nokukunda compatriot Maria Sharapova mufainari ari straight seti. Mugore rake rekupedzisira, Dementieva akasvika kuma semi-fainari e2010 French Open kwaakasiya basa achipesana nemukundi wekupedzisira, Francesca Schiavone mushure mekurasikirwa neseti yekutanga mu tie-break. Dementieva akapedza gore uye basa rake rakagadziriswa World No. 9. 