 Complete the following phrase:  On January 31, 2019, the Mavericks sent Dennis Smith Jr., DeAndre Jordan, Wesley Matthews, and two future first-round draft picks to the New York Knicks in exchange for All-Star Kristaps Porziņģis, Tim Hardaway Jr., Courtney Lee, and Trey Burke. At the quarter-mark of the 2019-20 season, the Mavericks began with a 156 record through their first 21 games. With Luka Dončić averaging a near 30-point triple-double, leading the Mavericks in points, rebounds, and assists and entering MVP contention, he led the Mavericks to the top-rated offense in the league. On December 12, 2019, the Mavericks won against the Detroit Pistons in Mexico City, due to the NBAs efforts to expand internationally. During that game, Luka Dončić tallied 41 points, 12 rebounds, and 11 assists, becoming the first player in NBA history to record multiple 40-point triple-doubles before turning 21-years-old. Dončić was later selected to his first 