It is an acrylic surface because irrespective of what's beneath it, what the players stand on is made of acrylic paint.

Underneath the surface is a synthetic rubber base which is mounted on concrete or asphalt.

Rebound Ace is similar to the surface used at the US Open but has more cushioning and differs in the type of sand used in the top paint.

Some players have complained that the surface becomes sticky when it gets hot but the surface has been tested in temperatures up to 70 degrees Celsius and manufacturers dispute the claims.

And it seems that injuries are more down to the timing of the Australian Open in the tennis calendar and the general cushioning and grip of the surface.

BBC tennis commentator Andrew Castle explains: "Rebound Ace is renowned for having a bit of give in it so it's easier on the body.

"But the real problem is that when it heats up, it has even more give to it.

"So you can catch the edge of your shoe on it and that can cause ankle injuries.

"Basically you've just got to pick your feet up."

The surface

Ball speed

Player speed

It's the Australian Open's business how they want the court Lleyton Hewitt

I like the surface. The ball bounces a bit higher, it's not too fast and the courts suit my game Marat Safin

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