US Open finalist Daniil Medvedev has played amazing tennis this year with the new Tecnifibre Razor Code White Tennis String. Thermocore Technology is used in the manufacturing process, combining polyurethane with the base polyester material and utilizing varying temperatures during the different stages of construction, allowing the matrix structure of the string to soften. Thanks to Thermocore Technology, ATP Razor Code plays softer than traditional poly strings. It has more power and absorbs plenty of shock and vibration, providing much-improved play-ability. Razor Code represents Tecnifibres most control-oriented polyester string, and it pairs very well with the T-Fight and new expert TF40 racquets. Tecnifibre ATP Razor Code is the true next generation of poly string technology, and its benefits are not just for tour-level players, but for all hard-hitting topspin players looking for more comfort, power and durability. Try the thinner gauges for more spin and a livelier feel, or the thicker gauges for improved durability.