There are two stars who will need no introduction when the Boston Celtics and Dallas Mavericks meet in Game 1 of the NBA Finals on Thursday night.

Dallas guard Kyrie Irving and Boston big man Kristaps Porzingis find themselves pitted against their former teams, with Irving's breakup with the Celtics much messier than Porzingis' departure from the Mavericks.

Irving spent two seasons in Boston and told fans that he planned on re-signing with the Celtics following the 2018-19 campaign.