Celustka has seen Gus Poyet take charge of Sunderland in the past week.
"I have had a good feeling about my performances in the opening matches, even though we have not started the season very well and have only picked up one point," he told the Sunderland Echo.
"I'm playing in the competition that I dreamed about, but, when you look at the table, it's definitely not ideal. But I still believe that we just need the break of one victory because, in lots of matches, we have played well.
"We scored an early goal against Manchester United and they were shocked.
"Although our league position is not good, we dominated the first half.
"But, unfortunately, they got two quick goals in the second half and we couldn't react."
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