Borussia Dortmund midfielder Shinji Kagawa says Jurgen Klopp is a "great coach" and credited the German for helping to build his career.
Klopp – who replaced Brendan Rodgers at Liverpool this season – has made an impressive start at Anfield, with resounding victories over Chelsea, Manchester City and Southampton in recent weeks particularly impressive.
Under Klopp’s tutelage, Kagawa was part of the Dortmund side that won back-to-back Bundesliga titles in 2011 and 2012.
The Japanese international has been impressed by how quickly he has transformed the Merseyside club.
"I am interested in how much and how quickly Klopp, the manager that I know, can change the team at Liverpool," Kagawa told Omnisport. "He is a great coach and the results prove it, so I hope it will continue for him and I am interested in how much they can contend as a team this season.
"Already they have drastically changed and I have read articles that they won eight games in the last 10 games [seven in 11]. I do watch the games sometimes when I have time or when they broadcast on TV."
The Bundesliga club re-signed Kagawa in 2014 after the attacking midfielder endured a mixed two-year spell at Manchester United.
"Every moment with him is a good memory for me rather than picking a particular one up. It is also good memory to win the titles with him," Kagawa said. "He trusted and featured me. I was not famous coming from the second division of the J.League, so I totally appreciate that. It is great memories with him.
"He helped me to build up the steps leading to Manchester United, the club that everyone all over the world knows, the club that I have known since a little kid, in only two years after I joined from Cerezo."