Meier was critical of his side's lack of aggression against Augsburg, suggesting that they had not taken the game seriously enough.
"We now have to prove that this was a wake-up call," he said. "As soon as we get back the players who are injured, then some players are going to realise that we have other options."
The signing of Robert Tesche from Hamburg has already increased the competition for places and ensured the central midfielders can no longer take it for granted that they will play.
After appearing in the second half against Augsburg last weekend, Tesche is in line for his first start for the club when they make their first ever visit to the Borussia Park Stadion.
Gladbach coach Lucien Favre is not expecting the side he saw become the first to be beaten at home by Augsburg to turn up again on Saturday.
"I was in the stadium for that game and the goals they conceded were very strange," Favre told a press conference.
"They are going to be more stable against us. They are strong in defence and do a great job turning defence into attack, so it's not going to be easy for us."
Nevertheless, Gladbach need to claim all three points to remain in the hunt for a place in Europe next season.
"We've got to do better (than last weekend)," Favre said. "Above all, we've got to ensure the final ball is good."
Favre is still without Martin Stranzl due to injury and is therefore set to name an unchanged side from a week ago.