ERSA PRO STRINGER ISSUE 6-2018 prostringer6-18 web | Page 27

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string patterns
4 KNOT STRINGING PATTERN - UNIFORM TENSIONS
The 4-node stringing pattern is a "modern classic" and now it's considered as standard and widespread solution for the
Grand Slam, ATP tournament as well as minor tennis events.
In this case, the tension applied on the vertical strings is the same as that applied to the horizontal strings, starting from
the consideration that during the assembly of the horizontals, the presence of the pre-installed verticals implies a friction
that will return an effective lower tension than the nominal one .
Basically applying 24kg on the vertical ropes and 24kg on the horizontal ropes will result in a differentiation of tensions due
to the presence of friction during assembly and traction of what are called "cross strings".
The difference in the effective tension between mains and crosses will be greater the higher the coefficient of friction
present between the strings installed and the greater the higher the applied tension.
WHAT DO WE EXPECT ?
From a 4 knot string to uniform tension we expect a "race ready" competitive racquet behavior.
A choice preferred by many professionals who want to have the maximum in terms of control and do not seek a little help
in terms of ball grip on the rotations, power, tolerance and comfort of play.
ADVANTAGES 
- stiffness and consistency of the string plane
- maximum control
- optimal response in terms of control on flat shots and backspin
- high tension stability
- high durability for the strings
- very easy to string  no tension variation
DISADVANTAGES 
- lower power comparing with other patterns
- lower trajectories
- lower topspin response  higher friction  lower snap-back action
- lower tolerance on off center shots
- smaller sweetspot
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ERSA PRO STRINGER // ISSUE 6-2018