@Alagavat Transfermarkt resizes all player images to 300x390, which in a case like this makes it pretty blurry compared to the original. You can use this method to get the original version:

1) Go to the player's/staff's profile, click the profile image to view a larger image, and open that in a new tab.
2) You'll get something like this URL: https://img.a.transfermarkt.technology/portrait/big/435648-1576766482.jpg?lm=1
3) Copy this part of the image URL, the rest doesn't matter. https://img.a.transfermarkt.technology/portrait/big/435648-1576766482.jpg?lm=1

4)  Then paste that part of the URL at the end of this URL: https://tmssl.akamaized.net/images/portrait/originals/

Like so: https://tmssl.akamaized.net/images/portrait/originals/435648-1576766482.jpg