A portable tennis playing apparatus allows players to play the game of tennis in various indoor environments. The portable tennis playing apparatus can be assembled and disassembled easily, and provides the opportunity for the players to not only enjoy the game of tennis but also to improve and hone their skills.

A portable tennis playing apparatus allows players to play the game of tennis in various indoor environments. The portable tennis playing apparatus can be assembled and disassembled easily, and provides the opportunity for the players to not only enjoy the game of tennis but also to improve and hone their skills.

A net system used for example a sports game and a fine height adjustment system is provided. A cable mount is coupled to one or both of the upright posts with coarse height adjustment. A cable system for supporting the net includes a first end coupled to the upright post, and a second end coupled to a tension system of the other upright post. An intermediate portion of the cable system is slidably coupled along a pivoting member of the cable mount. The cable mount includes the fine height adjustment system that is coupled to the pivoting member. The pivoting member is pivotable in an upward direction or a downward direction upon movement of the fine height adjustment system without relieving tension from the cable system. The total distance of travel provided by fine height adjustment may be less than an incremental distance with coarse height adjustment.

A headband satisfying tennis association rules consisting of a first length of a nontransparent vinyl or fabric band coupled to a second, lower positioned length of transparent polyvinyl film of at least 100%-150% greater width in reducing the blind spot in overall tennis play.

A pickleball training net includes: a bracket and a rebound net, a cross member is arranged in a middle of the bracket, the cross member divides the bracket to form an upper half area and a lower half area, the rebound net is arranged in the upper half area of the bracket, the bracket is provided with a number of hooks to fix the rebound net, the rebound net is provided with a identification tape, a middle section of the rebound net is divided into a rebound area by the identification tape. The pickleball training net can assist the training person to complete single person training and the pickleball training net is easy to carry, the simulation is high, the rebound effect is good, the requirement on the field is low, and the inclination angle of the bracket can be adjusted according to the need.

A canister for holding objects such as but not limited to tennis balls. The canister includes a preferably cylindrical canister body. An attachment means lies above the center of gravity of the canister so that when the canister is affixed to a net that divides or surrounds a playing surface, a vertically aligned orientation of the canister is maintained even when the canister no longer holds the rounded objects.

A retractable recreational net system includes a first self-supporting pole arrangement mountable on a ground surface; the first pole arrangement having a first net storage reel; a second self-supporting pole arrangement mountable on the ground surface; the second pole arrangement having a second net storage reel; a net selectively extendable between the first pole arrangement and the second pole arrangement; and at least one retraction mechanism to selectively retract the net onto at least one of the first net storage reel or second net storage reel.

In a flat roll-up structure for rolling up net body flatly, at upper and lower end of net body, it is installed respectively with protruding object, meanwhile, at roll-up mechanism, it is installed with upper and lower positioning roller module to limit the movement scope of net body, therefore, when net body is to be expanded, net body, through the guidance of upper and lower positioning roller structure, can be withdrawn flatly; when protruding object used to roll up net body is limited for its movement scope by upper and lower positioning roller module, and is limited by the limiting part of upper and lower positioning roller module, the net body can then be rolled up flatly without generating up and down shift, which can avoid the generation of tying problem due to unbalanced receiving in net body.

A let detection system includes a sensor including an accelerometer attached to a tennis net. The sensor is in wireless communication with an umpire device able to send a message to the sensor, wherein the message causes the sensor to calibrate and begin monitoring for a let. The sensor determines a three-dimensional (3D) vector representing the gravity acting on the sensor as a baseline. When the sensor detects vertical acceleration of the net relative to the baseline and the vertical motion is above a preset threshold, the sensor automatically transmits a let notification message to the umpire device.

A rigid frame comprises two opposing vertical members with a bottom end attached to a portable base and a top end, the rigid frame further comprising a bottom horizontal member spanning between the bottom ends of the two opposing vertical members. The bottom horizontal member provides crossbar support by tying together forces of the two opposing vertical members. Two rigid posts include a first rigid post detachably affixed to a first vertical member and a second rigid post affixed to a second vertical member. Each of the two rigid posts are taller than the vertical members and support a top mounted light directed towards a game court for pickleball. The vertical members support a pickleball net.