Players pick up ranking points for appearances as well as winning, but it is still a remarkable achievement for the former "super brat" of tennis, who is now a respected elder statesman, with his rants a well-packaged part of his act.
More likely, their longer-term growth will bump up against the ceiling of a European market in which the contestable low-cost segment is smaller than it is in the U.S., and well-established packaged-tour operators and national-flag carriers can block deeper inroads into the leisure- and business-travel segments.