Premium tennis ball for demanding players The Tecnifibre X-One is a premium quality tennis ball. If you put a lot of emphasis on quality and good features, the internal pressure ball is a good choice. Whether for a tournament or regular training, the Tecnifibre X-One tennis balls are well suited for a variety of uses. The ground doesn’t have to be considered either, because the tennis balls can be used on all surfaces. These balls are made of felt and impress with good bouncing and playing properties. Take advantage now and get the X-One tennis balls for your next match. Highlights: Ideal for demanding players Provides good flight characteristics Suitable for all surfaces Made of 72 per cent natural felt