The PES 2017 | 20-21 Season Facepack Update vol. 7 by DC includes 6 new player faces, compatible with PC version.
How To Install Facepack Update v7: [Download]
1. Extract the archive with winrar or 7zip and copy .cpk file to
C:\Program Files (x86)\Steam\Steamapps\Common\Pro Evolution Soccer 2017\download\
2. Open and select DP in DpFileList Generator
3. Add .cpk as last checked, generate new DpFileList and enjoy game.