The Signum Pro Firestorm is the string of choice for Mikhail Youzhny, Sergiy Stakhovsky, Mikhall Kukushkin and Philip Petzschner.
ATP - Top - 500 - Pros playing with SIGNUM PRO ....
New optimized molecular structure Outstanding Power Excellent playability and comfort Minimum tension loss Excellent ball control High durability
Firestorm is the perfect choice for the professionals and aggressive players. It also has a modern design.