The Reds' Head Coach spoke with the press ahead of his side's long trip to Cardiff for Tuesday night's Sky Bet Championship clash with the Bluebirds.
Having made it two wins from two games since taking the reins at Oakwell, with Saturday's big win over promotion favourites Watford, Valérien Ismaël isn't getting carried away.
The Frenchman has already had to deal with a number of fitness issues, with Callum Brittain the latest player to join the physios after limping off at the weekend against the Hornets.
Ismaël reiterated his earlier point that each player will have their chance to impress him.
"It is going to be too early for Callum Brittain." Valérien explained.
"He will maybe be back for Saturday, but not tomorrow. We are also without Jordan Williams, Romal Palmer and Cauley Woodrow. It's a long list, but it is what it is.
"Victor Adeboyejo is back training so there's another option for us.
"I know these injuries will occur because of the intensity of our football along with the amount of games we are playing in this season. The schedule is very difficult because of the situation we are all in.
"We have to try and manage things properly, but we will have to use our squad. Everyone is important, everyone needs to be ready."
Despite back-to-back victories kicking off his tenure, Valérien knows there is much to work on with his Reds squad.
"We have a very good base here," he told us. "But our fitness and energy levels must improve if we are able to maintain our performances.
"At 60 minutes we notice a difference in the games and so there is always much to work on. But with my staff I know we can get better.
"My players are open to what we are doing. And with some of them, we see quick results. But it's been a week. We have lots of time ahead of us. It's a process."
Tuesday night sees Barnsley head to Wales to take on Cardiff City, a side below the Reds in the Championship standings.
But Ismaël knows the challenges that the Bluebirds will pose the Reds and is looking forward to preparing his side for what he knows will be a physical encounter.
"It is the next tough game, against a strong opponent. They have a big target they hit in former Barnsley player Kieffer Moore. So we have to stand up in our duels. We have to be on the second balls and of course, be aware at set-pieces.
"We know their weaknesses. We have worked very well in training today and will enter the game with a plan to get another positive result.
"It is my job, my coaching staff's job, to prepare our players every day. That is our responsibility. We have to make sure our players go into every situation in a confident way, a strong way."
