J.R. Smith blew off the media yesterday after practice, but has told fans directly his disastrous 4-of-15 outing in Sunday’s Game 1 is unrelated to a perception he partied at the 40/40 Club on 25th Street and Broadway Saturday night. Game 1’s start time was 3:30 p.m., with the players expected to show up at the arena before 2 p.m.

Past midnight Saturday, the official Twitter account of the 40/40 club announced Smith was in the saloon watching the Floyd Mayweather fight, which ended close to 1 a.m. A 40/40 Club publicist confirmed the tweet was genuine. The tweet didn’t mention whether he was drinking or how late he stayed at the sports bar/nightclub.

In response, Smith tweeted to those who were worried that his poor game was related to his 40/40 Club appearance: “First an formost I wasn’t clubbing before the game so y’all can kill that. Don’t try an find reasons when I miss shots! #Ho.’’

One of the narratives from his Sixth Man Award campaign is Smith’s decision to tone down his nightlife that he candidly admitted hurt productivity in his first season as a Knick. Smith is expected to opt out to become a free agent in July, but his recent tailspin won’t help his market value.

Smith has been a train wreck since elbowing Jason Terry in the face late in Game 3’s victory in Boston. He was suspended for Game 4, then had clunkers in Games 5 and 6.

Smith was 3-of-14 in his return in Game 5, then 5-of-13 in Game 6. In the past three games, Smith is shooting 12-of-42, dropping his shooting percentage for the playoffs to 36.4 percent. His defense on Brooklyn native Lance Stephenson was also poor.