Nike Zoom GP Challenge 1 men's tennis shoe for hard courts Striking. Brilliant! For the best of the best and everyone on the way there. The GP Challenge 1 is made for boldly converting break opportunities, confidently serving and impressively smashing. Thanks to Air Zoom elements, lateral stability and a consistent fit, you can unleash all your inner power in your next match. Zoom, Zoom Thanks to the Air Zoom element in the forefoot, you can stretch all the way to your toes and set off on your next sprint even more easily. An Air Zoom element in the heel provides support. Keep moving A robust midfoot plastic plate provides stability for quick changes of direction and gives you power during play, transferring energy from movement to movement. Reinforcements on the eyelet strips and sole ensure a snug fit and support during lateral movements. This is further enhanced by the additional padding on the heel. Durable traction Additional rubber in the toe area, especially on the big toe, offers more durability. Extra abrasion-resistant rubber in the forefoot provides durability and traction. The heel area has been specially developed for abrupt movements, such as pulling the foot back at impact. Easy to put on The traditional U-design in the neck area allows for easy donning and adjustability. The padded tongue with breathable mesh keeps you cool and comfortable. More DetailsDesigned for wear on hard surfacesCushioned insole