Wales captain James Merriman tries to get away from the Australia defence
Wales suffered a 24-0 Bowl semi-final defeat to Portugal at the Dubai Sevens after earlier seeing off the Arabian Gulf 26-7.
On the opening day Wales lost to New Zealand and Australia.
New coach Paul John began his career in charge with a 28-7 defeat to world number ones New Zealand.
John's team then fell 22-17 in a thrilling showdown with Australia and progressed to the Bowl with a 26-12 victory over Zimbabwe.
But after beating the Arabian Gulf, John's side came a cropper against Portugal.
John had named a young squad for the opening two events of the International Rugby Board World Series in Dubai and George.
"Our fundamental aim is to develop regional and international players so this is a great opportunity," he said.
"We have seen the benefit Sevens has given to the likes of James Hook, Jamie Roberts, Chris Czekaj and Aled Brew, if we can produce more regional or international players this year, we'll be doing our job.
"We have had some limited but very productive training sessions and the coaches and players have responded brilliantly to Sevens training."