The correct pair in the given options is:

Option 1: 1 only

1. Cannes: France - This pair is correctly matched. Cannes is a city located on the French Riviera and is internationally known for the Cannes Film Festival. The Cannes Film Festival is one of the most prestigious film festivals in the world, attracting filmmakers, actors, and celebrities from around the globe. France is renowned for its rich history in cinema and has been a significant contributor to the film industry.

The other pairs in the options are incorrect:

2. Davos: Denmark - This pair is not correct. Davos is a town located in Switzerland, not Denmark. It is known for hosting the annual World Economic Forum (WEF) where global leaders, business executives, and experts gather to discuss and address pressing economic and social issues. Switzerland is often associated with neutrality, and Davos has become synonymous with the WEF.

3. Roland Garros: The Netherlands - This pair is also incorrect. Roland Garros is a famous tennis tournament held in Paris, France. It is one of the four Grand Slam tournaments and is played on clay courts. The tournament is named after the French aviator Roland Garros, who was one of the pioneers of aviation and a World War I hero. The Netherlands, on the other hand, is known for its strong tennis tradition and has produced notable players but does not host the Roland Garros tournament.

Therefore, based on the given pairs, only option 1, "1 only," is correctly matched.