On Saturday, Anthony Davis showed out for a national television audience and put a serious scare into the Golden State Warriors in his postseason debut . On Sunday, it was Kyrie Irving's turn to make a blockbuster premiere. [ Follow Dunks Don't Lie on Tumblr: The best slams from all of basketball] It shouldn't have surprised any of us that the 23-year-old point guard would look awfully comfortable in the playoff spotlight; after all, we're talking about a former No. 1 overall pick and a three-time All-Star who won Most Valuable Player honors at the 2014 NBA All-Star Game and the 2014 FIBA World Cup . But Irving made quick work any lingering doubts about the way he'd handle his first taste of postseason play. Kyrie made his first five 3-point attempts, scoring 20 points in 21 first-half minutes against an overmatched Boston Celtics defense. He'd finish with 30 points on 11-for-21 shooting — becoming the 11th player in the past 20 years to score 30 or more in his first career playoff game — to lead the Cavs to a 113-100 win , giving the Cavs a 1-0 lead over Brad Stevens' C's in their best-of-seven first-round Eastern Conference playoff series. LeBron James added 20...