The 36-year-old decided to retire from playing following two-years with Slavia Prague.
“My mind and heart would love to carry on, but my body is against it,” he told sport.cz.
“I still feel some pain in the knee and cannot play at 100 per cent, so it makes no sense to torture myself and my team-mates.
“The best moment of my career? That has to be the Champions League triumph with Liverpool.
“But even the transfer to Liverpool alone or my first professional contract with Slavia have been my childhood dreams come true.”
