Visit The Boston Globe Share on Twitter Share on Facebook Comment on this Scroll to top of page By Howard Fendrich Associated Press January 27, 2019 MELBOURNE, Australia — Novak Djokovic was so good, so relentless, so pretty much perfect, that Rafael Nadal never stood a chance.Djokovic reduced one of the greats of the game to merely another outclassed opponent — just a guy, really — and one so out of sorts that Nadal even whiffed on one of his famous forehands entirely.In a remarkably dominant and mistake-free performance that yielded a remarkably lopsided result, the No. 1-ranked Djokovic overwhelmed Nadal 6-3, 6-2, 6-3 on Sunday night to win a record seventh Australian Open championship and a third consecutive Grand Slam title, raising his count to 15 overall. Advertisement ‘‘An amazing level of tennis,’’ Nadal acknowledged. Get Sports Headlines in your inbox: The most recent sports headlines delivered to your inbox every morning. Thank you for signing up! Sign up for more newsletters here After dropping only four games in the semifinals, Djokovic spoke about being ‘‘in the zone.’’ Clearly, he did not budge from there, producing 34 winners and only nine unforced errors Sunday.And this was against no slouch,…