Boston is going to have to figure out something at the point guard spot and has already targeted restricted free agents Malcolm Brogdon and Tomas Satoransky, according to Yahoo Sports.
Walker previously expressed strong desire to remain in Charlotte, where he has spent his first eight seasons in the league. They traded center Aron Baynes on draft night and could have $34 million in cap space available if they renounce the rest of their free agents.
"After Kyrie and Kemba, I think Rozier is next up, " said a person familiar with the Knicks' thinking.
While the Celtics can meet with Walker as soon as June 30, nothing is a sure thing until a contract can be signed on July 6. He averaged a career-high 25.6 points and 4.4 rebounds per game last season along with 5.9 assists while playing in all 82 games.
Venezuela gov't says it thwarted plot seeking to kill Maduro
Information Minister Jorge Rodriguez did not go into detail about the assassination attempt, but did implicate Colombia and Chile. No country at the OAS proposed inclusion of Maduro's government, which formally withdrew from the regional group in 2017.
Rozier led the Celtics to the 2018 Eastern Conference finals when Irving went down with another knee injury.
The team is also looking at another guard in Tomas Satoransky of the Wizards, according to the report.
The Knicks front office still views Ntilikina as more a shooting guard. He shot 39 %from the field, but a respectable 35.3% from 3-point range.
National Basketball Association free agency opens up Sunday at 6 p.m. EST.