Ralf Rangnick struggled in his short-term spell with Manchester United.
The German coach struggled in his role as an interim manager for Manchester United although he had successful spells with other European clubs.
He was expected to take the advisory role in the summer but he mutually agreed to cut all ties with the Red Devils after taking the Austrian manager role.
David Alaba who was worked with Rangnick for many years now tagged the manager as ‘world-class.’
Alaba told The Athletic: ‘He has been really good, you can see we have a really good plan and you can see it works for us on the pitch.
‘He doesn’t want us to let the opponents breathe air. It is good for us. I have known Ralf since I was 18 years old and he is a world-class coach.
‘What he did in the past is something special and now I am seeing it close up. He showed what he can do at Leipzig, Salzburg and Hoffenheim.
‘He didn’t have a lot of time in Manchester. He has a really good plan and knows a lot about football.’
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