WALTHAM — Al Horford looked a bit timid at the beginning of Game 5. He was getting pushed around somewhat in the paint by the likes of Kevin Garnett , Brandon Bass , Greg Stiemsma  and Ryan Hollins .
Then, a funny thing happened. He started hitting open jump shots.
He got his swagger, shook of the rust from Game 4 and three months of time on the bench rehabbing his torn left pectoral muscle and voila: Horford took over Game 5.
Horford finished the must-win game for the Hawks with 19 points and 11 rebounds in helping the Hawks to a 87-86 win over the Celtics .
“He’s a good player, he’s a good player,” Hollins said Thursday morning in the team’s shootaround. “He hits his open shots, passes well, plays really well with that team. We have to pay attention to him and make things tough for him. He’s a good player. He’s going to get his shots.
“He’s a good player. He thrives on contact, creating space for himself running the floor. He’s an All-Star in the league. That’s what All-Stars come out and do.”
What can Hollins provide?
“Energy, effort, teamwork, stuff that doesn’t show in the stat sheet,” said Hollins, who had five points, four rebounds, four fouls and one block in 19 minutes on Tuesday in Game 5.
Now, in the hours before Game 6, a game the Celtics need to win to avoid a trip back to Peachtree Street and Game 7 Saturday. It’s up to Garnett, Stiemsma and Hollins to step up and not give him the comfort zone he enjoyed in the final three quarters as Horford found his game.
“We all have to be ready, ready to play,” Hollins said. “It could be any of us called on. It could be Greg’s game, my game, Brandon’s game, whoever. We’ll all be ready tonight.
“The coaching staff keeps us always prepared. We’re ready for any situation, could be 20 minutes, five minutes, no minutes. We’re ready to go and ready to play.”