By Jon Wertheim The Spaniard vanquished injuries, his hungriest young rival and his competitive ghosts en route to his second Australian Open title As he stepped up to the line at 5–4 in the fifth set with tennis history on his racket, Rafael Nadal surely knew the ghosts of 2017 were present. That year in Melbourne, Nadal had a similar advantage over Roger Federer in the final. He was up a break in the fifth set, and he faltered. And in ‘22, he did so again. Daniil Medvedev broke his serve and looked destined to take the match to a final-set tiebreak. But, of course, that’s not what happened. …