Atalanta look so dishevelled at the moment. They have 4 forwards on the pitch along with one attacking midfielder (Zapata, Muriel, Miranchuk, Ilicic, Pasalic). Ilicic is playing in the midfield, whilst Pasalic is playing at left wing back. They've struggled to control the midfield, and they've basically been trying to hoof the ball forward to Zapata at almost every opportunity.
Juve are able to win the ball more easily due to Atalanta's panicked approach, and Atalanta are getting even more frustrated, conceding more fouls and getting more cards along the way.
I don't get why Gasperini wouldn't keep one wing back on, at least. They're badly missing one right now.