At the 2008 tournament, the courts were changed to a blue plexicushion surface, replacing the green Rebound Ace.
Edberg's game is a natural to frustrate opponents on the fast Rebound Ace courts.
Prior to the Australian Open changing its court surface, the tournament was played on Rebound Ace.
A sliced backhand stays lower on grass than on Rebound Ace, however, and Callens rarely got a short ball today that she could attack.
He traditionally struggles on Rebound Ace, but he won a tournament on that surface last week in New Zealand.
Perhaps it is time she ripped up the Rebound Ace in Switzerland and replaced it with red clay.
The change of the venue also lead to a change of the court surface from grass to a hard court surface known as Rebound Ace.
They opted for Rebound Ace instead, a rubberised compound that no one in Europe had seen before.
But since it moved to the Rebound Ace of Flinders Park in 1988, he has yet to win it again.
After twenty years of playing on Rebound Ace, the courts were changed to Plexicushion, a marginally faster surface.