Who defeated Rafael Nadal in the 2014 Australian Open men's singles final?

Stan Wawrinka defeated Rafael Nadal in the 2014 Australian Open men's singles final.

Wawrinka won 6–3, 6–2, 3–6, 6–3 at Melbourne Park to claim his first Grand Slam singles title. Nadal entered the final as the top seed, while Wawrinka was seeded eighth, making the result a major upset in the tournament's championship match.

The Swiss player had already produced a breakthrough victory in the quarterfinals, defeating four-time champion Novak Djokovic in a five-set contest. By beating Nadal in the final, Wawrinka became the first man since Sergi Bruguera at the 1993 French Open to defeat both of the top two seeds at a major.

Nadal struggled with a back problem during the final, but Wawrinka's victory was not merely a default result: he won the first two sets and controlled the match's decisive passages. Wawrinka later completed a career Grand Slam by winning the 2015 French Open and 2016 US Open.