Marseille start life after De Zerbi with Strasbourg draw
The Italian coach left the south coast club earlier in the week following last Sunday's 5-0 thrashing to fierce rivals Paris Saint-Germain.
Goals from Mason Greenwood and Amine Gouiri seemed to be enough to give interim boss Jacques Abardonado a vital three points, but Sebastian Nanasi's second-half strike set up a nervy finale at the Stade Velodrome before Joaquin Panichelli converted a penalty deep into injury time.
The late collapse condemned Marseille to remaining in fourth place, 11 points off the pace.