Rosted, who this week said Brexit is “the most stupid economic decision for a long time”, admitted that it could have a significant effect on the company’s financial performance in Europe, where it generates nearly a third of its business.In an interview with CNBC on Tuesday, he said that the firm’s “biggest concern is really the European impact of a potential Brexit because it’s very often discussed as an isolated event, but it will have an overall impact on the European economy.

“Europe is about 30 percent of our business,” he added.In fact, western Europe is Adidas’ main market, however sales in this region showed signs of a slowdown last year. The firm said its pricing strategy had been “a little too ambitious” for a mature market like Europe, and vowed to beco…