CHICAGO — Tacko Fall, the 7-foot-7 center who nearly slayed Duke after giving Zion Williamson fits in the NCAA Tournament, has popped onto the Knicks radar with their 55th pick following his head-turning draft combine in Chicago, according to a source.

The Knicks met with 30 kids but did not interview Fall. Knicks brass entered the week in Chicago unsure he was an NBA player.

That has changed for the Knicks and several other clubs after he showed mobility and set combine records for wingspan (8.25) and standing reach (10.25). He also has a size 22 shoe, Fall said, which is not the best attribute for being fleet of foot.

“With my size, the biggest thing they’re always looking for is can he move, run the floor, step out and guard?” Fall said during Thursday’s media press conference. “I feel I have the ability to do those things. I had the ability to play with great competition (in Chicago) and it was a blessing. Thank God I’m in this position and I have to take advantage of it. I think I’m doing good and holding my own and not doing anything out of character.”

Fall, who averaged 11 points, 7.7 rebounds and 2.6 blocks last season at the University of Central Florida, was not invited to the regular combine but to the “Next 40” that started last Sunday. Those on-the-bubble prospects competed for five spots for the main combine and Fall made the cut, increasing his chances of getting drafted.

The Knicks figured Fall, 23, might fall out of the draft — he’s too susceptible to guarding the high pick and roll — and would be available to sign as a free agent, but now no one can be so sure. NBA teams still regard Fall as a limited player whose ability could shine in spot duty in playoff games, clogging the lane when the game becomes more old school.

Certainly, Fall showed out in the NCAAs in the last-second, 77-76 loss to Duke in the second round.

“In my college basketball career that was one of the best games I’ve been in,” Fall said. “The atmosphere, it was high-stakes game for us. We just competed. It helped build confidence going toe to toe against that.”

Fall said it is a struggle to find nice dress shoes for his foot size. But all he cares about is having sneakers to play for an NBA team.

“I’m showing I can run the floor, have great hands,” Fall said. “I came in way better shape than I thought I’d be.”