Sport and design combine at Dominique Perrault’s tennis centre in Madrid, which mixes a spectacular roofscape with a magical spatiality. In the Californian Desert, Robert Stone designed a remote guest house in shades of black. we learn from six designers about the new zest for architecture in Colombia, while in Jakarta, Adi Purnomo’s house is a rational concrete structure where plants can grow and blossom. In Suffolk, is the result of a collaboration between an architect and client with a shared interest for motorcycling. Finally, a letter from Michael Webb tells us how Ahmedebad is striving for progress even as it is tugged back into the past.