Which tennis string should you choose?

In short: the right string depends first on three personal priorities — comfort, control or durability — since no string maximises all three at once. This guide covers each family in depth and offers concrete guidance by player profile.

The main families in depth

Monofilament (polyester)

Made of a single extruded strand, often with a surface coating, monofilament (commonly called "polyester" or "poly") is the go-to string for control. Its stiffness limits deformation on impact, giving a direct, precise feel. Some textured or shaped versions are designed to bite the ball more for extra spin. In return, it transmits more vibration and loses tension faster than other families, which usually means more frequent restringing.

Multifilament

Made of many thin fibers (sometimes thousands) wrapped in a protective coating, multifilament comes closer to the feel of natural gut. The slight movement between fibers on impact spreads out the shock and gives a soft, comfortable feel with generous power return. It remains less durable than monofilament under heavy play.

Natural gut

Natural gut remains the benchmark for comfort, power return, and above all tension maintenance over time — it loses tension more slowly than any synthetic string. Its main downside is cost, well above other options, plus a sensitivity to humidity that needs a bit more care.

Synthetic gut / nylon

A nylon string with a single or multi-strand core, synthetic gut is the most versatile and affordable choice. It's often the factory-installed string on new rackets. It doesn't particularly stand out on any one criterion, but remains a reliable starting point, especially for a player new to the sport.

Hybrid

A hybrid setup combines two different strings — usually monofilament in the mains (which take the most wear) and a softer string in the crosses. The goal is to capture part of the benefits of each family: more durability and control than multifilament alone, with more comfort than monofilament alone.

Each family has its limits too: monofilament loses tension fast and stays uncomfortable for a sensitive arm; multifilament holds up less well under very heavy play; natural gut demands a sizeable budget and a bit more care in storage; synthetic gut doesn't stand out on any particular criterion; hybrid setups take a bit longer to string and require accepting a trade-off rather than a single-axis optimum.

Understanding the key criteria

• Comfort: the "soft" feel on impact, tied to how flexible the string is and how it absorbs shock.
• Control: the ability to predict precisely where the ball will go, generally better with a stiffer string.
• Power: the energy the string returns on impact — the more a string deforms, the more it gives back.
• Spin potential: the string's ability to bite the ball for topspin or slice, favoured by textured surfaces and thinner strings.
• Durability: resistance to breaking and wear over time.
• Tension maintenance: how quickly the string loses its initial tension — often underrated, but it has a direct impact on how long a setup actually stays effective.
• Budget: the string's own cost, weighed against its real durability rather than price alone.

Which string fits your profile?

• I'm just starting out: a synthetic gut or entry-level multifilament, to favour comfort and keep costs down while your game is still developing.
• I play once a week: a multifilament or comfortable synthetic gut; extreme durability isn't a priority at this level of play.
• I play several times a week: a hybrid or monofilament, to cut down on restring frequency while keeping good control.
• I break strings often: pure monofilament or a thicker gauge, trading some comfort for durability.
• I'm after more comfort: natural gut if budget allows, otherwise a premium multifilament.
• I'm after more control: a monofilament, possibly textured, or a hybrid with polyester in the mains.
• I'm after more power: a multifilament or natural gut, strung towards the lower end of the manufacturer's recommended range.

These are general tendencies, not universal rules — there's no brand recommendation to follow blindly. The right choice depends on your racket, your swing and your own feel, and it's entirely normal to need to test two or three options before finding yours.

String and arm comfort

A softer string (multifilament, natural gut) or a lower tension can reduce vibration on impact, which some players seek out for arm or elbow discomfort. This isn't medical advice, though: for persistent pain, see a healthcare professional rather than looking for the answer in the string alone.

The stringer's role in this choice

The string that's "ideal on paper" doesn't replace the judgement of a stringer who knows your racket and swing. This choice is closely tied to two other decisions: what tension to choose and the monofilament versus multifilament debate, which we cover in dedicated articles.