How much do we need to revise our assessment of Novak Djokovic and Rafael Nadal after their early losses in Monte Carlo this year? Carl Bialik and I discuss the week that was in the principality from many angles, starting with those two key upsets. Is Stefanos Tsitsipas now the biggest threat to Nadal at Roland Garros? Has Djokovic fallen back to the pack? Has Rafa lost a step? Is Dan Evans someone worth watching on clay now? Can a slice backhand ever be a weapon on a slow surface? What can flat hitters do to overcome their disadvantage on clay? We have lots of questions, and offer at least a few potential answers.