The survival test with Korda obviously proves to be therapeutic for Rafael Nadal. Champion in 2008, 2010 and 2013, the Spaniard after nine years finds himself once again in the role of the all-time favorite after the missteps of Daniil Medvedev and Alexander Zverev.The seventeenth success of the season, the number four hundred in the category, is worth the comparison in the round of 16 with Reilly Opelka but above all the third place (tied with Sampras in 1997 and Federer in 2017) in the ranking of the best starts in history.The problems of the very Spanish champion basically lasted for a set. Forced to recover a break from behind and to avoid the tie break in the opening set. Without resorting to special effects, the number four of the block in California manages to find quality and quantity in …