Rafa Nadal and Roger Federer, rivals but mostly friends, want to fill the facility, 11,000 spectators, for a good cause and will play a charity match for Rafa Nadal Foundation.
On Monday go on sale tickets to be held in Madrid between the two best players of the moment.

The best kicks, the best left, the best way around and the best will not work right on 22 December, from 18.30 in the Box Magic of Madrid, to win games.
Rafa Nadal and Roger Federer, rivals but mostly friends, want to fill the facility, 11,000 spectators, for a good cause and will play a charity match for Rafa Nadal Foundation.
The main and only objective will be to raise funds to help children with disabilities and from disadvantaged backgrounds. That match was the smallest gain for which the Foundation works from Created in November 2007.
"This will be the first big event we do with the Foundation to present to the public and especially to your support for our projects. It makes me special pleasure to do with Roger. Besides that we're friends, we both have a commitment to solidarity and we decided to take our situation to help others, "said Rafa Nadal, founding trustee of the Foundation that bears his name in the Foundation's website.
Tickets for the event will go on sale from Monday 1 November. The price of these range between 26 euros (high tier) and 33 euros (lower tier). Can be purchased through the Foundation website, www.fundaciónrafanadal.com.