The knot is the smallest part of a tennis string job, but it can affect how securely the strings stay in place and how much tension is lost at the tie-off. Knowing the main tennis string knot types helps you understand a stringer’s choices—and avoid tying a knot that is too bulky for the frame’s grommet.
Most players only need to recognize a few options. Parnell and Wilson Pro knots are popular tie-off choices, while a starting knot or a starting clamp is used to anchor the first string. The right choice depends on the racket’s pattern, grommet size, and stringing instructions.
What tennis string knots do
A stringing machine pulls each string to a set tension. At the end of a string run, the stringer ties it to an anchor string through a tie-off grommet. The knot holds the end in place, but it does not keep every part of the string bed at exactly the reference tension. A small amount of tension loss at the tie-off is normal.
Knots are usually used at the end of a main or cross string run. A standard two-piece string job often has four knots; a one-piece job commonly has two. The exact pattern depends on the racket. A knot should sit snugly against the frame without crushing the string, stretching the grommet, or being forced into a hole that is too small.
Common tennis string knot types
| Knot or method | Typical use | Main advantage | Potential drawback |
|---|---|---|---|
| Parnell knot | Finishing tie-off | Compact and tidy | Needs consistent technique |
| Wilson Pro knot | Finishing tie-off | Secure, familiar option | Can be bulky if tied poorly |
| Double half hitch | Finishing tie-off | Simple and widely known | May slip or lose more tension if poorly dressed |
| Single half hitch | Usually a step within a finishing knot | Quick to form | Often not the best choice alone |
| Bulky starting knot | Anchoring the first string on some jobs | Can hold without a starting clamp | Too large for some grommets |
1. Parnell knot
The Parnell knot is a compact finishing knot used by many stringers. Its low profile can be helpful when a tie-off hole is tight, and it can leave a neat finish when the knot is pulled into place correctly. It is a strong all-around option for players who want a clean, reliable tie-off.
Its main downside is that a neat Parnell knot takes practice. If the loops are crossed incorrectly or the knot is not seated firmly, it may not hold as intended. As with any knot, follow the frame’s recommended tie-off holes rather than choosing one simply because it looks convenient.
2. Wilson Pro knot
The Wilson Pro knot is another common finishing knot. It is valued for its secure hold and is used by stringers working on a range of rackets. For a recreational player, the practical difference between a well-tied Wilson Pro and a well-tied Parnell is usually less important than correct tensioning and a suitable tie-off location.
A poorly dressed Wilson Pro can look bulky. That can be a problem if it must pass through a small grommet, so the stringer should not force it through a hole that is not designed for the knot.
3. Double half hitch
The double half hitch is a basic option made by tying two half hitches around the anchor string. It is familiar and can be effective when tied and tightened carefully. Some stringers favor a different knot for a more compact finish, but the method itself is not automatically wrong.
The risk is inconsistent tightening. If the first hitch is loose or the two turns are dressed poorly, the knot may settle after the machine is released. A stringer should pull the knot snug while protecting the string and frame—not yank hard enough to damage either.
4. Single half hitch
A single half hitch is a simple knot, but it is generally better understood as one part of a finishing sequence than as a universal stand-alone tie-off. On its own, it may be less secure than a properly completed knot. If you see one used, ask your stringer whether it is part of the frame’s recommended method and whether it is suitable for that racket and string.
5. Bulky starting knot
A starting knot anchors the first string when the stringer begins a job without using a starting clamp. It is intentionally larger than many finishing knots, helping it resist slipping back through the grommet. That size is also its limitation: some frames have narrow holes or require a different starting method.
Starting knots should not be confused with finishing knots. A stringer should use the racket maker’s pattern and avoid forcing an oversized knot into a grommet. On some jobs, a starting clamp is the better tool.
Starting knot or starting clamp?
A starting clamp is a temporary tool that grips the string while the first strings are installed. It can let the stringer begin without relying on a large knot in a small grommet. The clamp is removed later, so it is a starting method rather than a knot type.
Neither method is best for every racket. A starting knot can be convenient, while a clamp offers flexibility when the frame’s pattern or grommets make a bulky knot unsuitable. Experienced stringers choose based on the racket’s instructions and their equipment.
How to choose the right knot
- Follow the racket’s stringing instructions. The recommended tie-off holes matter more than personal preference.
- Match the knot to the grommet. A bulky knot should not be forced through a small opening.
- Consider the string. Natural gut, multifilament, polyester, and other strings can respond differently to handling. Avoid sharp bends and excessive pulling.
- Prioritize a clean, secure tie-off. A familiar knot tied correctly is better than a preferred knot tied carelessly.
- Ask your stringer about the method, not just the name. Knot choice is one part of the job; pattern, tension, and careful installation all matter.
For players, there is rarely a need to request a particular knot unless a stringer is working outside the racket’s recommended pattern. If a knot is sticking out, appears loose, or has damaged the grommet, ask the stringer to inspect it before playing.
Frequently Asked Questions
Which tennis string knot is best?
There is no single best knot for every racket. Parnell and Wilson Pro knots are common finishing choices, while a starting knot serves a different purpose. The best option is one that suits the frame, fits the grommet, and is tied correctly.
How many knots are on a tennis racket?
A typical two-piece string job has four knots, while a typical one-piece job has two. Some string patterns or methods differ, so the racket’s instructions are the guide.
Does the knot change racket tension?
The knot can affect tension near the tie-off because a small amount of tension is lost when the string is secured. However, overall string-bed feel also depends on the reference tension, string type, pattern, and stringing technique.
Can I use any knot to string a racket?
No. A knot must be suitable for the job and the frame’s grommets. An oversized starting knot, for example, may not fit a narrow tie-off hole. Follow the racket maker’s instructions or use an experienced stringer.
Final Thoughts
The main tennis string knot types serve two jobs: securing the end of a string run and anchoring the start of a job. Parnell, Wilson Pro, and double half hitch knots are common tie-off choices; a starting knot is used at the beginning, while a starting clamp can provide an alternative. For most players, a correctly installed string job matters more than the name of the knot.
