Zeman had a row with Sampdoria Coach Ciro Ferrara this week and the pair did not shake hands before kick-off.
"We didn't cross paths," said Zeman. "As I am older, it was Ferrara's duty to come to me."
However, Ferrara insisted "my parents taught me that you welcome a guest to your home. Marassi is my home, I was a guest at the Olimpico. I was absolutely ready to shake hands with Zeman, as this is the civilised thing to do."