Andy Murray faces tough US Open test in first round amid struggles with cramp

• Murray faces 24th seed Francisco Cerundolo in first round
• Cam Norrie seeded seventh and plays Benoit Paire first

Along with the lofty task of battling one of the best tennis players in the world, Andy Murray will also have to focus on the mundane chore of loading himself with fluids and remaining hydrated as he attempts to move on from a challenging hardcourt swing, during which he struggled badly with cramping.

Murray underwent sweat and blood tests during the past week, which both came back clear, indicating an issue with his hydration, condition or environment.