The Austrian Porsche factory driver will be replaced in the #91 GTE Pro class 911 RSR alongside Gianmaria Bruni for the Monza 6 Hours on Sunday by Makowiecki, who was the third driver in the car when it took the class win at the double-points Le Mans WEC round last month.
Lietz tested positive for COVID on Wednesday night prior to his scheduled departure for Monza, and after a second positive test on Thursday Porsche approached the stewards of the meeting about bringing in a replacement.
