Babolat

Xcel French Open Black 17

Nylon Gauge 17 1.25 mm In production

Lab measurements for Babolat Xcel French Open Black 17, ranked against all 789 strings in the database. Every figure below is a testing-machine result at a fixed reference tension, not a playtest opinion.

Measured values

Stiffness

lb/in

not measured

Tension loss

%

not measured

Energy return

%

not measured

Spin potential

4.7

higher = more spin off the string bed

Ball bite

0.413COF

higher = grabs the ball harder

Snapback

0.087COF

lower = strings slide and snap back

How it ranks against all 789 strings

Spin potential 4.7 · 48th pct

More spin potential than 48% of strings tested.

Ball bite 0.413 COF · 32nd pct

Grips the ball harder than 32% of strings tested.

Snapback 0.087 COF · 39th pct

More string-on-string friction than 39% of strings tested.

More from Babolat

What these numbers mean

Stiffness · lb/in

How much the string bed resists deflection. Higher plays firmer and more controlled; lower plays softer and easier on the arm.

Tension loss · %

Share of the reference tension the string sheds under a fixed test protocol. Lower means the bed stays where you strung it for longer.

Energy return · %

Share of impact energy handed back to the ball. Higher plays livelier and more powerful.

Spin potential

Ball friction divided by string-on-string friction. Higher means better bite with a cleaner snapback, so more spin.

Ball bite · COF

String-on-ball friction. Higher grabs the ball harder through the brush.

Snapback · COF

String-on-string friction. Lower lets the mains slide and snap back into place after impact.

Compare Xcel French Open Black 17 against 789 strings Find the right string for me