Both firms have been working on the marketing and promotion of this year's Ryder Cup - due to take place at Gleneagles in Scotland from September 26 to 28 - in partnership with the European Tour, which is responsible for organising and managing the reputation of the event when it is hosted on European soil.

As part of the contract extension, Grayling and Landmark Media will manage the European Tour's global reputation, promote its tournaments to golf fans and market its international network of properties.

"We have enjoyed a superb relationship with Grayling and Landmark Media, who have exceeded our expectations with the Ryder Cup contract," said marketing communications director for the European Tour Tim Hunt.

"They have a real understanding of our objectives and they represent us with professionalism and passion.

"It was a natural process to ensure we could also benefit from that advice and guidance right across the European Tour.

"We operate on a global stage and Grayling's international network closely aligns with our needs.

"We expect that contribution to aid our push to engage golf fans while increasing the commercial impact of the Tour around the world."