MORE: Carmelo Anthony to sign with Trail BlazersHe was also heckled during the national anthem, according to ESPN’s Malika Andrews.The 24-year-old forward, who spent three-plus seasons in New York before being traded in January to the Mavericks, was expecting the reaction.”It’s normal that they feel that way,” Porzingis told reporters Wednesday. “All I can do is just look forward to what I have in front of me, not behind.”After the game, he was asked if he heard the chants from the fans.It’s not the first time Porzingis has been booed by Knicks fans: They did it after the team drafted him fourth overall in 2015. So far, Porzingis has done well away from his first NBA team, averaging 18.3 points and 7.9 rebounds in the 2019-20 season prior to Thursday. Unfortunately, the Knicks can’t say the same, even though they completed a season sweep of the Mavs with a 106-103 victory. The win pushed them to 3-9 on the season. Kristaps Porzingis made his return to Madison Square Garden on Thursday — and he did not receive a warm welcome.During the game, fans started an obscene chant while he was at the free throw line.