Where is what in the Porsche Arena? Opening hours of the Porsche Arena during the tournament. Porsche Tennis Grand Prix souvenirs Montessori Kindergarten in the Kids and Activity Village The fastest route to the new Porsche Arena. Don't miss a rally - when SWR is broadcasting. The Porsche Tennis Grand Prix has been one of the sporting highlights in Stuttgart for over 30 years. But the city and region also have a lot more to offer. For visitors, it’s therefore always worthwhile staying on a few days longer.