The Czech rates the English top flight as the joint-best league in the world, alongside the Bundesliga, and is hoping to establish himself into the Black Cats first-team plans
The 24-year-old defender became manager Paolo Di Canio's 10th signing of the summer on Tuesday when he agreed a season-long loan from Trabzonspor.
Celustka spent two years in Turkey, where he made 55 appearances in the Super Lig and reached the Turkish Cup final last season, but admits he could not resist the lure of the English top flight.
"Every match against clubs from the top of the Premier League table is like the Champions League," he told www.idnes.cz.
"The whole world is following this competition and together with the German Bundesliga, they are the best leagues in the world."
Celustka has so far been impressed by the Black Cats, as well as his first training session under Di Canio, and indicated he is looking forward to playing for the Italian.
"In the first training session he automatically put me at right-back and I had a good feeling about it," he added. "He wants me to get used to the team as fast as possible.
"They are regular members in the Premier League. So far from what I have seen, the facilities are on a high level and the stadium is beautiful.
"They have about 40,000 fans attending every match and so far Sunderland have made the best impression on me."