CLEVELAND — With improved defense and a stellar second half from Trae Young, the Hawks rallied to beat the Cavaliers, 107-101, in a must-win play-in game Friday at Rocket Mortage Fieldhouse. Next up, the Hawks will begin the playoffs in Miami Sunday. Below are some takeaways from the win: 1. With this win, the second of two straight must-win play-in tournament games, the Hawks have officially nabbed the Eastern Conference’s No. 8 seed. They will advance to face the No. 1 Miami Heat in the first round of the playoffs, playing Game 1 Sunday and Game 2 Tuesday, both on the road. It’s a tough sche…