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TENNIS BALL MACHINES

Lob-ster has been servicing the tennis community for 34 years now, with their reasonably priced full featured ball machines. Thanks to Lob-sters reasonable prices, no other company has more machines in service. With machines weighing in at 20-32 lbs, sporting convenient handles and oversized wheels, these machines can go anywhere, and can easily fit the trunk of a car. Unlike other sweeping ball machines, some Lob-ster tennis ball machines features settings like "Random Dual Oscillation", which can hit up to nine spots on the court. Nobody else does tennis ball machines like Lob-ster! Anyone for tennis?
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Wowshopper > Exercise & Fitness > Lobster Tennis Ball Machines > Rules For Tennis

Rules For Tennis Index
4. The Racket

Rackets failing to comply with the following specifications are not approved for play under the Rules of Tennis:

a. The hitting surface of the racket shall be flat and consist of a pattern of crossed strings connected to a frame and alternately interlaced or bonded where they cross; and the stringing pattern shall be generally uniform, and in particular not less dense in the centre than in any other area. The racket shall be designed and strung such that the playing characteristics are identical on both faces. The strings shall be free of attached objects and protrusions other than those utilised solely and specifically to limit or prevent wear and tear or vibration, and which are reasonable in size and placement for such purposes.

b. The frame of the racket shall not exceed 29 inches (73.66 cm) in overall length, including the handle. The frame of the racket shall not exceed 121/2 inches (31.75 cm) in overall width. The hitting surface shall not exceed 151/2 inches (39.37 cm) in overall length, and 111/2 inches (29.21 cm) in overall width.

c. The frame, including the handle, shall be free of attached objects and devices other than those utilised solely and specifically to limit or prevent wear and tear or vibration, or to distribute weight. Any objects and devices must be reasonable in size and placement for such purposes.

d. The frame, including the handle and the strings, shall be free of any device which makes it possible to change materially the shape of the racket, or to change the weight distribution in the direction of the longitudinal axis of the racket which would alter the swing moment of inertia, or to deliberately change any physical property which may affect the performance of the racket during the playing of a point.

The International Tennis Federation shall rule on the question of whether any racket or prototype complies with the above specifications or is otherwise approved, or not approved, for play. Such ruling may be undertaken on its own initiative, or upon application by any party with a bona fide interest therein, including any player, equipment manufacturer or National Association or members thereof. Such rulings and applications shall be made in accordance with the applicable Review and Hearing Procedures of the International Tennis Federation (see Appendix III in 2001 Friend at Court).

 

Case 1. Can there be more than one set of strings on the hitting surface of racket?

 

Decision. No. The rule clearly mentions a pattern, and not patterns, of crossed strings.

 

Case 2. Is the stringing pattern of a racket considered to be generally uniform and flat if the strings are on more than one plane?

 

Decision. No.

 

Case 3. Can vibration dampening devices be placed on the strings of a racket and if so, where can they be placed?

 

Decision. Yes; but such devices may be placed only outside the pattern of crossed strings.

 

Case 4. In the course of play, a player accidentally breaks the strings of his racket. Can he continue to play with the racket in this condition?

 

Decision. Yes

 

USTA Comment:

If after play has begun it is discovered that a player has been using an illegal racket or an illegally strung racket, all points played stand. The player must find another racket immediately. If the discovery occurs after the match is over, the match still counts.

 

 

The Singles Game Rules
1. The Court
2. Permanent Fixtures
3. The Ball
4. The Racket
5. Server & Receiver
6. Choice of Ends & Service
7. The Service
8. Foot Fault
9. Delivery of Service
10. Service Fault
11. Second Service
12. When to Serve
13. The "Let"
14. The "Let" in Service
15. Order of Service
16. When Players Change Ends
17. The Ball In Play
18. Server Wins Point
19. Receiver Wins Point
20. Player Loses Point
21. Player Hinders Opponent
22. Ball Falls on The Line
23. Ball Touches Permanent Fixtures
24. A Good Return
25. Hindrance of A Player
26. Score In A Game
27. Score In A Set
28. Maximum Number of Sets
29. Role of Court Officials
30. Continuous Play and Rest Periods
31. Coaching
32. Ball Change
The Doubles Game Rules Wheelchair Tennis
1. The Doubles Game
2. The Doubles Court
3. Order of Service in Doubles
4. Order of Receiving in Doubles
5. Service Out of Turn in Doubles
6. Error in Order of Receiving Doubles
7. Service Fault in Doubles
8. Playing the Ball in Doubles
1. The Competitive Wheelchair Tennis Player
2. The Service
3. The Ball in Play
4. Player Loses Point
5. Wheelchair/Able Bodied Tennis


Appendix II: Alternative Scoring Methods for Tennis





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