PARIS (CNN) —When it comes to grand slam finals, Stan Wawrinka is used to playing spoiler. After upsetting Rafael Nadal at the Australian Open last year, he engineered another major surprise Sunday by topping world No. 1 Novak Djokovic 4-6 6-4 6-3 6-4 to claim a second grand slam title. Wawrinka isn't a member of the "Big Four," but his achievement at Roland Garros means the Swiss now has the same number of grand slam trophies as Andy Murray. While the Scot owns a 2-6 record in major finals, Wawrinka is a perfect 2-0. "I still have a problem to...