Question: At the 2016 Summer Olympics, Marija Ulitina defeated a former world number one, who reached that ranking in what year?
Sentence (from "Marija Ulitina"): She represented Ukraine in the 2016 Summer Olympics and proceeded to the knockout round after defeating the former world number one Saina Nehwal of India and Lohaynny Vicente of Brazil in the group stage.
Relevant evidence: Yes