Nice find mate.
I think there may be more to this.
Here's a scenario for you;
A grid-work of electromagnets is secreted under the court.
The balls in play are 'specially' manufactured, and include very fine strips of either neodymium or just plain old ferrous metal foil, inside the ball
(the weight would remain the same as a normal ball).
The match is played and huge sums are bet on the outcome.
The grid is monitored, and activated either (probably) by computer or manually at the appropriate moment, in order to cause a momentary 'hiccup' in
the bounce or direction of the ball and wrong-foot the player you're betting against.
Sports are rigged all over the planet, it's not such a 'tin foil' conspiracy to assume the same is true of tennis.
Perhaps on this occasion, the computer controlling the electromagnetic grid buried under the court, went haywire and left a grid element
(electromagnet) activated. The 'acted out' drilling holes in the court surface may have simply coincided with the grid operator resetting the computer
or turning off that particular electromagnet, and making it appear as though an air bubble was the cause.
It would be quite easy to accomplish this fiddle, technologically speaking.
edit on 22/1/2011 by spikey because: (no reason given)