Butler trailed 103 - 102 .
Butler got the foul on Marcus Smart while shooting a jumper and calmly sank the crucial charities with 0.9 seconds left to seal the come - from - behind win as Al Horford 's baseline jumper at the buzzer was way off .
Trailing 103 - 102 , Butler got the foul on Marcus Smart while shooting a jumper and calmly sank the crucial charities with 0.9 seconds left to seal the come - from - behind win as Al Horford 's baseline jumper at the buzzer was way off .