"We got performances from guys that up until now we expect a lot from," said Clark. "And they are stepping up.
"We have a rest day so we can recover our bodies and be ready for the next game against Germany which will be tough."
Great Britain, with several young players emerging from their Towards 2016 development programme, have played with a great amount of fighting spirit in the first three performances of EuroBasket 2013. On the opening day they clinched a win against Israel, where they fought back from nine points down late in the fourth quarter to take the game to overtime and prevail in the extra period.
The Brits then competed for good spells against France before succumbing to the San Antonio Spurs guard Tony Parker and a stellar supporting cast.
Germany themselves are 1-2 in Group A. After upsetting France on the opening day, they then fell to Belgium and group leaders, Ukraine. Clark is aware of the threat that Germany, led by their talented forward Robin Benzing, possesses.
"Germany are a tough team, they showed what they can do against France but they've lost the last two, so in tournament play anyone can win a game," Clark said.
"We have to be ready to win, we need to know how to win and learn from the experiences so far."
GB head coach Joe Prunty was thankful for a day off to ready his players for the challenges of their final two first round games.
"The big thing is understanding that we do have a big game coming up after the rest day," Prunty commented. "So we'll get prepared, we'll mentally and physically rejuvenate. We've got a game plan on how to attack getting ready for the game.
"We'll get ready. We'll take advantage of the fact that there is a rest day and we need to make sure that not only we recover from three hard fought games, three hard-fought days, but also prepare for two very important last ones."
The Standard Life Great Britain team's game against Germany tips off at 1:30pm (UK time). It will be broadcast on ESPN and livebasketball.tv.
The other group games see unbeaten Ukraine meet France and Belgium take on winless Israel.