Dunlop Fort All Court Tennis Balls – High Altitude (Can of 3)

At altitude, standard sea level pressurised tennis balls bounce higher and travel faster due to lower atmospheric pressure and reduced air resistance – which affects pace, bounce trajectory, and the overall feel of the game significantly. Dunlop Fort All Court High Altitude is specifically engineered to compensate for this, delivering a bounce and playing feel equivalent to sea level conditions on courts situated above approximately 1,200 metres above sea level.

For South African players – particularly those based in Johannesburg, Pretoria, and the Highveld generally – using altitude-specification balls is the technically correct choice. The modified internal pressure of the High Altitude ball accounts for the lower atmospheric pressure, producing a more controlled, regulation-compliant bounce that matches the ITF’s specifications for high-altitude play. Tournament tennis in South Africa’s major centres is played with high altitude balls, and club players benefit from training with the same specification.

The Fort All Court’s quality credentials carry through: premium felt construction, consistent bounce, and the tournament pedigree that makes it the preferred ball for serious play. Switching from sea level to high altitude balls for Highveld players typically produces an immediate, noticeable improvement in ball control and a more familiar, predictable playing experience.

Suitable for all court surfaces at altitude. Sold as a can of 3 balls.