Coutinho has been a revelation for Steven Gerrard's side, and Digne is expecting a big summer transfer market from his club.
"You will see that there will be the quality to break into the top seven in the Premier League," said Digne.
"Managing to attract someone like Philippe is already a sign. This summer, things will still move a lot. There are ways. You have to progress quickly. It is an ambitious club.
"It's just fabulous. The infrastructure, the staff of around 30 people, the personalised video rooms, the nutritionists there every day, the five physical trainers.
"Everything is done to make you feel good, to progress."
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