Players practice on the shaded side of the court under the newly-completed retractable roof atop Arthur Ashe Stadium a day before the start of the US Open Tennis Championship at the USTA National Tennis Center in FLushing Meadows, New York, USA on August 28. The new retractable roof is the largest of any tennis stadium in the world and is just part of a series of improvements to the tennis center which also include a new Grandstand, a new South Plaza, new seating, a new food village and a new boulevard of activities. EPA/Matt Campbell