"I have learned in England that there is still so much to improve," said Hleb in Frankfurter Allgemeine. "I have always dreamed of playing in a great club. Now I have learned that it is not so easy and a lot of work.
"The first year was a killer. I felt very lonely.
"It was clear that The Premier League would be a challenge - but with this pace, I have not expected this.
"The Bundesliga is still a good league, but a season in England feels like two in Germany.
"I will tell you an example: When I was here at the beginning, everything went chop chop, so fast. The pace was madness, even in training.
"I look for the ball in front of me, then where I can play it - when I looked down again the ball was gone.
"The English league is the best league in the world."