The French Tennis Federation's offices and the home of its president Jean Gachassin were raided Tuesday in an investigation into alleged corruption and embezzlement, sources said.

The raid was linked to the alleged illegal sale of tickets for the French Open and the "conditions of awarding of the contract for the extension of the Roland Garros stadium", France’s financial prosecution service said.

The French Tennis Federation (FFT) confirmed that its offices had been raided and said that it was fully cooperating with authorities.

The raid comes after months of rumours about the existence of a ticket sale racket and long-running rows over the expansion of the Roland Garros stadium.