Yes, this could be normal. Different reasons might explain this:

String Tension Longevity

If you have never restrung your racquet before or have played long hours of tennis with the same strings, it is normal that your freshly restrung racquet seems tighter. Although some types of strings like natural gut preserve their tension over time well, all strings loosen up as time passes and hours are spent on the court. Sergetti stringing offers a string tension lasting up to 3 times longer than that of a conventional stringing.

The Sergetti Sensation

The Sergetti tension equivalence will give a different sensation than conventional strings. This is the direct result of our unique process: since tension distribution is uniform and efficient, your reference points are no longer the same. For this reason, a short adaptation period may be required.

Once adapted, you will be able to determine if your chosen tension perfectly fits your personal needs to maximize your Sergetti experience.

In case you have to get a new Sergetti Tension Sheet with a lower tension, your Tension Sheet giving you a  too tight feeling is not lost. At times of the year when temperatures are higher, the stringbed relaxes more. So, for example, a racquet strung at 54 lb could offer sensations as if it were strung at 53 or even 52 lb.

Calibration of Stringing Machines

There might also be a slight variable between tension entered on the numeric keyboard of the machine and the real tension applied on the string. For example, if the tension prescribed is 57 lb but the real tension applied is 60 lb, you would have the impression of playing with a 60 lb strung racquet. The stringing machine calibration may differ from one stringer to another, so because of this, the tension may be lower or higher than it is should be.

Yes. As long as your stringer has an electronic, crank or Drop Weight stringing machine, you are good to go by handing him your Sergetti personalized tension sheet. The process requires only a few minutes more than a conventional stringing when using an electronic stringing machine.

It is a scientifically developed process. All aspects that influence the performance and the final result of a restringing have been evaluated and integrated into a sophisticated program that takes into account more than 50 indispensable variables.

Due to the physical constraints of the proximity of the strings with the racquet frame, it is therefore physically impossible to obtain better results than what we propose. The Sergetti technology therefore generates the largest sweet spot size reachable.

The process may be applied to all types of standard tennis racquets, with all types of stringing combinations and at tensions varying from 30 to 70 lbs.

Known brands such as Wilson, Babolat, Head, and others, focus their efforts on the continuous enhancement of sporting equipment and not the perfecting of stringing techniques. In fact, conventional and differential stringing (meaning strings with different tensions for mains and crosses) have been taken for granted, hitting the brakes on future optimizations. Naturally, some experienced stringers have come up with some slight variations to conventional stringing, such as 50-50 or ATW, yet none has been proved to enhance the sweet spot nor the performance of racquets.

The Sergetti technology maximizes the durability of any restringing and this varies directly depending on the coefficient of friction of the vertical (MAIN) and horizontal (CROSS) strings used.

The higher the coefficient of friction, the more friction between the strings, the less the strings slide on each other at the impact of the ball, the less the durability of the string will be increased.

Conversely, the lower the coefficient of friction, the less friction between the strings, the more the strings slide over each other, thus increasing the durability of the strings, and up to 2.5 times.

The racquet manufacturers indicate on each product the recommended range of tension. For a pre-strung racquet, the tension of the strings is usually set at the median of the recommended range. If you’re restringing your racquet, not knowing the tension you need, your stringer may suggest to set the tension at the median setting recommended by the manufacturer.

Knowing this, you may choose your stringing tension using these basic principles: for more power, reduce tension and for more control, increase it.

Yes. ONLY if the new string models (mains and cross) you wish to use are in the same categories as the strings (mains and crosses) of the purchased sheet. The string categories absolutely has to be in the same order, meaning the same category for the mains and the same category for the crosses. All other sheet information must also be the same regarding the make and model of the racket, the tension and the owner of the sheet.

The strings in Sergetti’s list are broken down into 5 categories, which are from 1 to 5, in accordance to Sergetti’s very specific parameters. Each string category is listed between brackets at the end of each string model figuring on Sergetti’s string models list. This then allows each client who has already purchased a Sergetti tension sheet to use this same sheet.

The use of the same sheet with other strings of the same category as that sheet cannot guarantee that the tension of the new strings (mains and crosses) will be Sergetti’s ideal tension since every string is different and can provide a somewhat different sensation even when the mains and crosses categories are the same. If that is the case, the purchase of a new Sergetti tension sheet will be necessary in order to maximize your Sergetti experience with these new strings.

When you normally use 2 different tensions with the same string for the MAINS and CROSSES, or 2 different strings of the same categories*, the calculation is simple, the Unique Resulting Tension will be the average tension between these 2 tensions. For example, for 54 lb and 50 lb, or vice versa, the average tension will be 52 lb.

* Note that the category of each string is listed in parentheses at the end of each string name in our string drop-down menus.

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On the other hand, when the Main and Cross strings are in different categories, a calculation is needed to obtain the precise Unique Resulting Tension.

So the bigger the difference between the string categories, the bigger the difference in the string responses, so farther from the average will be the Unique Resulting Tension.

No. The calculation of the tensions remains the same since nothing changes at the level of the elements concerning the stringing (format, shape, pattern, position of the strings, etc).

However, when you change the weight, balance and “swingweight” parameters, the sensation of power may be somewhat different, which may require a different tension.

In such a case, it is best to know your ideal tension once the racket has been modified to make the ideal tension choice for your Sergetti Personalized Tension Sheet.