German sportswear firm Puma (PUMG.DE) has seen sales of Leicester City football jerseys rise fifteen-fold as a result of its winning the English Premier League title, chief executive Bjoern Gulden told a German paper.

Puma has provided the kits for Leicester, who were 5,000-1 outsiders at the start of the season, since 2012.

"The fans love such stories - the underdog coming from behind and pulling off something unlikely," Sueddeutsche Zeitung quoted Gulden as saying in its Thursday edition.

"The demand for jerseys has risen by fifteen-fold," he said.

Gulden did not say, however, whether Puma would pay more money to Leicester as a result of the title win.

"Our contract runs for another two years. Of course we're talking to them about how we can be more successful together."

Puma is much smaller than larger rivals Nike (NKE.N) and Adidas (ADSGn.DE) and its sponsor budget is smaller as well, meaning it has fewer big-name teams in its stable.

Gulden also told the paper Puma was not interested in competing to provide the kit for the German national team, saying the price would be too high.

He added there were opportunities for Puma to sell more football jerseys and shoes thanks to the upcoming European Championships.

"We've been selling jerseys since the end of 2015, we'll see the effect on shoe sales will come later. Sales volumes are rising," he said.