 In some cases such as Stadium Australia in Sydney, Docklands Stadium in Melbourne and National Stadium, Singapore, stadiums are designed to be converted between the oval configuration for cricket and Australian rules football and a rectangular configuration for Rugby and Association Football and in the case of Singapore's National Stadium, an Athletics configuration as well.Association football stadiums have historically served as track and field arenas, as well, and some (like the Olympiastadion in Berlin) still do, whereas a newer generation frequently has no running track to allow the fans closer to the field.Among winter sports, especially a speed skating rink can be a multi-purpose stadium.