Nico Harrison was the man behind the infamous Luka Doncic trade, which quickly became one of the most controversial ones in the league's history. The former Mavs general manager had a vision to build an iron-clad defense, and Doncic's poor defensive prowess was an obstacle to achieving his vision.So, Harrison convinced the Dallas Mavericks' owner, Patrick Dumont, to part ways with a generational scorer and bring in 10-time All-Star Anthony Davis. However, Harrison failed to bring his vision to life as the Mavs failed to make the playoffs last season and became one of the worst teams in the league this season.Luka Doncic, on the other hand, worked hard in the offseason and is having an MVP-caliber season. On Wednesday, ESPN's Tim McMahon wrote about the power struggles in the Mavericks' organisation. During one segment, he wrote that Harrison had convinced Dumont to trade Luka Doncic by calling his $345 million extension an awful investment."Doncic would be eligible to sign a five-year, $345 million supermax contract extension in the summer. That deal would be an awful investment, Harrison told Dumont, pointing to Doncic's conditioning concerns, poor off-court habits and recurring calf strains, predicting that his body would break down," McMahon wrote.Trading away Luka Doncic had a big impact on the fan base. "Fire Nico" chants started to erupt in almost every Mavs home game. After witnessing a terrible 4-11 start to the season, Dumont decided to pull the plug on Harrison's vision and fired him on Nov. 11.Luka Doncic shows commitment towards the Lakers after Nico Harrison's firingLuka Doncic attended a post-game conference after facing a 121-92 loss against the OKC Thunder on Nov. 12. During one segment of his media appearance, a reporter asked the former Mavericks star about his chances of a Dallas return following Nico Harrison's firing.Doncic dodged the question and instead expressed his commitment towards the Lakers."Right now, I'm just focused on the Lakers, man. Like, no further comments," Doncic said."Earlier, he was asked for his thoughts on Harrison's firing. However, instead of commenting on his former general manager, the Lakers star talked about his love for the Dallas fans."The city of Dallas, the fans, players, they always have a special place in my heart. I thought I was gonna stay there forever, but I didn't. ... Always, I can call it home. But right now, I'm focused on the Lakers, trying to move on."Doncic has proven himself as the missing piece in the Lakers' lineup. He is averaging 34.6 points, 8.5 rebounds and 9.0 assists on 47.2% shooting from the field.