Ka kammala wannan magana: A shekara ta 1371, Jelena ta sake fuskantar wani bala'i. Mijinta Jovan Uglješa, tare da 'yan uwansa Vukašin Mrnjavčević da Gojko Mrnjavčević, sun tattara sojojin su don ƙoƙarin dakatar da barazanar Ottoman da ke tasowa a cikin Balkans. Sun sadu da Turks a kogin Maritsa; kuma a cikin abin da ya biyo baya
Yaƙin Maritsa, an kashe 'yan'uwan Mrnjavčević guda biyu, da kuma babban ɓangaren rundunarsu. Abin takaici, asusun tarihi na zamani game da yaƙin ya ɓace. A cewar almara, Vukašin ya yi mamakin yawan mutanen Turkawa da yawa kuma ya yanke shawarar yin zango a daren kafin yaƙin. Osmanlis sun jira kuma sun kai hari kan sansanonin Serbia a cikin wani hari na dare kuma sun sami nasarar cin nasara duk da rashin daidaito. An jinkirta mamayewar Turkiyya na Raška da sauran lardunan feudal na Serbia, amma a babban farashi - mutuwar Jovan Uglješa da ɗan'uwansa.