Stan Wawrinka just won the Geneva Open and he's had quite a full schedule this clay court season, so let's see how he maintains his stamina for a grueling full two-week schedule.
Being the defending champion, much is expected of him to at least reach into the deeper part of the tournament. Without RF in the mix, Stan has Milos Raonic and Gilles Simon as the toughest opponent on his side of the draw.
On paper, Simon stands in his way in the 4R, Raonic in the QFs, Murray in the SFs and Djokovic in the finals. That is a tough field to play for him to retain the title he won last year.