Commonwealth silver medallist Jenna Randall (Rushmoor) is in action on the opening day in the solo free and technical events before teaming up with Olivia Allison (also Rushmoor) for the duet on Friday (20 July).
Strong synchro nations China, Japan and the USA are among the 13 countries taking part in this four-day event.
Britain's duo has been following a gruelling eight-week training programme to get to grips with a new routine as they continue their development towards 2012.
National Performance Director Biz Price is pleased with the progress they have made.
"This routine is of a much higher calibre than ever before and the girls have really developed after an eight-week training phase," explained Price. "Their aerobic capacity is much better and they are getting more height out of the water which will ultimately lead to higher points.
"Jenna and Olivia have performed at some major competitions now and we have already seen the benefits of their international experience.
"The Swiss open is one more competition to learn and get results from in the run up to the Olympics. I will be looking for the girls to finish in the top eight which will show just how far we have come.
"As they compete at more and more international events they will be exposed to a larger number of judges on the international circuit which will stand them in good stead for the future."
The 32nd Swiss Open Synchronised Swimming Championships take place from 19-22 July at the Hallenbad Oerlikon in Zurich. For details of the event log onto www.limmat-nixen.ch