With the offseason in full swing, players are dressing up for events, charities, vacations and photoshoots. 1 Eugenie Bouchard dressed up in a pale-blue dress for a charity event.2 Juan Martin del Potro looked suave as he posed for Rolex.3 Bethanie Mattek-Sands and her husband spent the day in the coolest camo.4 Anastasia Pavlyuchenkova went out into town, showing off in a dark red dress.5 Garbine Muguruza went flying in a casual, but elegant outfit.6 Sloane Stephens was feeling herself as she showed off a dark stripped...dress? Shirt? Whatever it is, it looked great.