"We are suffering a little bit about the injuries," explained the former Dutch Under-20 women's head coach who has been part of the GB set-up since May 2012.
"At the moment, Olufemi Hamilton and Jess Hurd have their injuries and we've lost Ella Clark. We play our games and we try to improve all the time but it's not an easy job for the moment. So we are suffering a little bit but it's okay."
The loss of 6'3" forward, Clark, is a blow to Griffioen's preparation but rather than looking back, Griffioen is focusing on moving forward with the players he has at his disposal.
"Clark has been one of the best players of the team, so it's a big loss. (But) I want to put all my energy in the players who are with the team now. All the players practice very hard, they are very eager to learn. We have made a lot of progression now. It's a good team. It's a good atmosphere, and we have good chemistry."
Solid contributions from the experienced Erin McGarrachan and Renee Busch in the most recent warm-up games showed that the Under-20 women have players capable of filling the hole left by Clark.
Although the games played in early August ended in narrow defeats (52-51 and 53-46 against Portugal and Italy respectively), Coach Griffioen feels that playing Division A opponents is the correct preparation ahead of GB's second time in the top flight.
"For me, it's always very good to have some tough opponents at the end of the preparation."
The Standard Life GB Under-20 women will complete their pre-tournament games this coming weekend as they travel to Portugal to play Switzerland before facing-off again against the Portuguese.