The decision follows the Weissach marque withdrawing the works drivers that raced at Le Mans 24 Hours from this weekend’s Nurburgring 24 Hours in the wake of a series of positive COVID-19 tests during routine checks. Of Porsche’s four IMSA GTLM drivers, three – Nick Tandy, Frederic Makowiecki and Laurens Vanthoor – were present at Le…