PHILADELPHIA – Al Horford has a word to describe Boston Celtics coach Brad Stevens: genius.
Horford raved about his coach's whiteboard skills after Stevens had played twice after the time-out. 98 overtime win the Philadelphia 76ers in Game 3 of the Eastern Conference semi-finals on Saturday at Wells Fargo Center.
Stevens called twice in the center of the ball to make sets as his team looked disheveled. The first result was a Jaylen Brown layup to tie the game with 24 seconds to play in the regulation; The second brought Horford in position to build a victory layup with 5.5 seconds in overtime muscle building. 
Both teams suffered an avalanche of missed layups, bad decisions and unlikely events. But the Boston Celtics were a few games better, and they now have a 3-0 series over the Philadelphia 76ers.
"Brad is a genius, man, unbelievable," Horford said during an on-court interview with ESPN immediately after the Boston victory, a 3-0 To lead the series.
The Celtics after a point when both Joel Embiid and Ben Simmons were absent with less than 21 seconds in overtime. Stevens called consecutive time outs of 8.4 seconds. Horford, who placed Robert Covington alone under the basket, caught a long praise from Marcus Morris and ended up on the opposite side of the edge to put Boston ahead of 99-98.
Al Horford hits the greenhorn and then steals the ball in Game 3 in the last seconds of the overtime.
"Sometimes he paints things, and I look at it, I'm like [confused]," said Horford playfully curling his face. "But Marcus made it, great pass, I missed some shots that I usually do there, but I did that, so it was good."
Horford missed the front end of two free throws with a chance to tie the game short time before. After his start-up session, he came on the ball possession and sealed the victory with two giveaways.
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Brown, who said Stevens designed a "helluva playcall" when Brown produced a similar layup after defending Ersan Ilyasova with a late defense, marveled at the way Stevens put his team in key baskets presented.
"We have two game-winning, game-binding buckets layups, that says it all," Brown said. "We played hard, we fought, it was a tough environment, but when it came to an ATO [after-timeout play]a big basket we needed, we got layups and I take off Brad Stevens hat."
41-year-old Stevens has become famous for his after-time play calls, especially with regard to how the opposition will defend a particular action.
In this postseason, the Celtics have a league-high 138 on timeout possessions, according to Synergy Sports data. The Celtics earn an average of 1,029 points per game, the fifth best mark among the 16 playoff teams until Saturday games. According to Synergy data, the Celtics are in this postseason average at 0.984 points per game and are thus in eighth place.
"This man Brad Stevens is a guru," said Morris. "He could have the best out-of-bounds I've ever seen, he called the switch [that got Horford on Covington at the end of overtime] and knew it was going to happen."