The players will be in camp for the next three days to kick-start preparations for the Scotland and London 7s tournaments.
Team manager Paula Biu said the players needed to show coach Ben Ryan what he wanted to see in a team that was determined to perform well and win.
He said players from the new extended squad, which was in camp last week, may impress Ryan and could make the cut for the final 16-member squad for the next leg.
"After these next three days of training, we can say something on how the team is shaping up," Biu said.
"Last week, we had the new extended training squad. We're working on the current squad this week and we will see what the players have to show us.
"Maybe Ben has seen something in some players in the extended squad that might not be in the current squad, so we don't know which players will be in the final 16-member squad."
Biu said the squad had fitness and the main focus now was on the skills, game pattern and combination.
"Ben is working on the skills and game pattern to suit the weather there (London and Scotland) and the combination is something he is working on as well."
Fiji is pooled with Wales, Argentina and Kenya at the Glasgow 7s.
Fiji remains on third spot with 112 points while New Zealand (136) is first and South Africa (129) second.
The Glasgow 7s will be held on May 3 and 4.
National 7s squad: Viliame Mata, Pio Tuwai, Semi Kunatani, Apisai Domolailai, Setefano Cakau, Benito Masilevu, Emosi Mulevoro, Waisea Nacuqu, Osea Kolinisau, Vatemo Ravouvou, Donasio Ratubuli, Samisoni Viriviri, Leo Naikasau, Jasa Veremalua, Samuela Saqiwa, Jona Tuitoga, Joeli Lutumailagi, Ropate Labalaba.
SUVA, (FIJI TIMES)