PARIS, May 25 : Four-times French Open champion Iga Swiatek charged into the second round with a comfortable victory on Monday, but another much-admired winner in Paris was unable to extend his stay as Stan Wawrinka bowed out of Roland Garros for the final time. French favourite Gael Monfils, who like Wawrinka will end his career when the season concludes, was also unable to keep his campaign going and fell 6-2 6-3 3-6 2-6 6-0 to compatriot Hugo Gaston in the evening clash on Court Philippe