He was brutal on Paul Pogba, clashing with the Frenchman at the club's Carrington training complex in front of the Sky Sports cameras.
And Mourinho was even worse towards Shaw, often slamming the England international in public.
Now, however, The Athletic have quoted an insider claiming Mourinho was 'absolutely horrendous' on Shaw in private.
“It was absolutely horrendous privately," they said.
“Much worse. But Luke didn't go within himself. He is a strong personality. In the end, he just ignored Jose's comments."