France beat Switzerland in the opening match of Great Britain's Davis Cup Finals group.

Ugo Humbert then beat Stan Wawrinka 6-4 6-4 as France took an unassailable advantage before they also won the doubles for a 3-0 victory.

Great Britain open their campaign against Australia on Wednesday.

In Group A, Chile clinched a 3-0 victory over Sweden in their tie in Bologna.

Cristian Garin beat Leo Borg, son of legendary Swedish player Bjorn, 7-6 (8-6) 3-6 7-5 before Nicolas Jarry eased to a 6-2 6-4 win over Elias Ymer in just over an hour.

Doubles pair Tomas Barrios Vera and Alejandro Tabilo then overcame Filip Bergevi and Andre Goransson 6-4 7-5.

Serbia coped without Novak Djokovic - due to join the team for their tie with Spain on Friday - to claim a 3-0 win over South Korea.

Dusan Lajovic beat Seongchan Hong 6-4 7-6 (7-3) while Laslo Djere overcame an early setback against Soonwoo Kwon to win 4-6 6-2 6-2.

Nikola Cacic and Miomir Kecmanovic bounced back from losing the first set to claim a 3-6 6-4 7-6 (7-5) win over Ji Sung Nam and Min-Kyu Song.

The Netherlands won the opening tie of Group D in Split after a 2-1 victory over Finland.

Otto Virtanen gave Finland the lead after his 7-6 (7-0) 6-4 win over Botic van de Zandschulp.

Tallon Griekspoor levelled the tie with a 7-6 (9-7) 6-3 win over Emil Ruusuvuori.

And Wesley Koolhof and Matwe Middelkoop then wrapped up a 6-4 6-7 (5-7) 6-3 win over Harri Heliovaara and Patrik Niklas-Salminen in the doubles.

How to watch the Davis Cup

All of Great Britain's matches will be streamed on the BBC iPlayer and BBC Sport website from 13:00 BST with updates on BBC Radio 5 Live.