Seemingly ready to rocket up the divisional ranks, Pena was set to fight Jessica Andrade at UFC 171. She was soon grounded by a controversial training injury that damaged several ligaments and the meniscus in her right knee.
While Pena was on the sidelines, Russian fighter Dudieva (11-3) made her promotional debut, narrowly winning a split decision over Elizabeth Phillips.
UFC Fight Night 63: Mendes vs. Lamas has a special start time with the main card beginning at 1 p.m. ET on FOX Sports 1 in the United States.