Arsenal boss Unai Emery believes the Premier League hosts the world's best footballers and teams.
The Spaniard is experiencing his first season in England after replacing Arsene Wenger in the summer.
Emery said: "It's very hard.
"They are very great teams here and every match, like yesterday against Everton, is very difficult.
"[There are] very good players, I think the best players and best teams in the world in this competition, they are here."