I read French articles about the French Tennis Federation and Roland-Garros and they are very worried there.
They're especially worried because of the Australian announcements, not only about this year but because the Australians also made big announcements for increases until 2016, which is visible in previous pages of the thread (around 40 million Australian dollars).
What they say is that the Australians have a great stadium, and they are in a good financial position to do that.
The French also think that Wimbledon and the US Open are in a much better position than the French Open.
Because they have already built a stadium which offers good possibilities for getting more benefits.
The French situation is very different, the stadium is small, and they are at the moment building a new stadium, and they also have many problems for that ... especially because they took a very risky decision to keep the French Open in Roland-Garros rather than moving elsewhere, which many people now think was a bad decision.
But at the moment they took that decision, there was not that pressure from the players on the prize money, which is really serious, because they really want big increases.
Which means that now they have a new stadium to build, with high costs, the extension is attacked with trials by the people who live there, and in the meantime you have that players' pressure
... and you have other slams who accepted too much in the FFT's eyes, esp. the Australian open
... because these other slams can afford more than them because they're better prepared according to the articles I read.
Then the constant fear that Roland-Garros's status as a slam may be contested still comes around.
For instance an article in French by a well-informed journalist on that :
It seems that Stakhovsky in his recent tweets said something like "the US Open is the least friendly grand slam", but the French Federation are also afraid of a boycott for their tournament which seems to be the most fragile in front of these players' money claims.
Of course, there's the possibility, which is indeed the trend of what's already happening at the moment, like for many things about the "public sector" in France at the moment, to downplay the Federation's expenses and their support to local clubs. They've already started that, but it worries them a lot.