Smalling struggled during defeat at Stoke City.
"We’ve got to go into it as if we need to win every game," he said. "We’ve not done ourselves any favours with losses like this.
"I think we all know if anything that (the Champions League) is the minimum we need to aim for.
"Each point we drop makes it hard for ourselves.
"It seems we are taking one step forward and then one back, but we must stick together; time is running out to pick up these points."
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