Scotland will battle to retain a leg of the IRB sevens world series after 17 countries applied to host from 2015-16.
The upsurge in interest – 25 countries initially registered – has put pressure on existing stake holders with only nine tournaments in 2013-14.
But Dominic McKay, SRU communications director, has come out fighting.
“Scotland is the home of sevens as it was invented in Melrose and we are very proud to host it,” he said.
“Because we have been running the IRB sevens event in Scotland for eight years we have a very strong and clear model that is supported by investment from commercial partners, Scottish Rugby, private partners and local authority partners,” he told Running Rugby magazine.
The tournament was initially at BT Murrayfield but switched to Scotstoun as part of the Commonwealth Games build-up.
• KIWI rugby league full back Kevin Lock is claiming he could have played union with Edinburgh but turned down an offer.
“I wanted to stay in league,” said Locke after debuting for Salford Reds this month.