Core hardness
Core hardness is how soft or firm the foam inside the racket is — the schema's soft, medium, hard, and the softest foam. The core decides how the ball leaves the face: a softer core flexes, keeps the ball on the face a moment longer and releases it with less power; a harder core rebounds quickly, adding power and a firmer feel. The trade is comfort: softer cores are gentler on the arm.
Diamond — pairs with a firmer core
Power shapes often carry a medium-to-hard core so the rebound adds power to the aggressive swing. The feel is firmer and the impact less forgiving.
Teardrop — pairs with a medium core
The all-court shape commonly uses a medium core: some rebound for power, enough flex to stay comfortable.
Round — pairs with a softer core
Control shapes often use a soft core or the softest foam, which flexes, forgives an off-centre hit and is easier on the arm — at the cost of some power.
Softer cores flex, comfort and forgive but add less power; harder cores rebound, add power and feel firmer.
Test what you have learned (and earn a score) with the quiz on the hub.