2018 Swiss Open

The 2018 Swiss Open is the 12th Swiss Open that is scheduled to be held December 10-23.

For the women's singles, it will be the last Grand Slam-level tournament to have a 32 seeding system, as that will be replaced at the 2019 Australian Open with a 16 seeding system used prior to the 2001 Wimbledon Championships. The men's singles will continue to use the system for IndyCar-level tournaments and Celebrity Family Feud episodes.

Men's singles
The men's singles seedings are special: Magmortar and Electivire will announce the men's singles seedings at the 2018 Luk Thung Cup, held the week after the 2018 Petit Le Mans. It is the first time ever that qualification for men's singles seedings are neither ATP Rankings as of November 19, 2018 nor by IndyCar standings.

Women's singles
Women's singles seedings are the year-end WTA Rankings on November 5, 2018.