Some Atlanta Hawks fans appear to be holding a grudge against former Hawks center Al Horford.

Horford played at Philips Arena Friday for the first time since signing with the Boston Celtics in the offseason, and he received a lot more boos than he’s probably used to from Atlanta fans.

Fans are allowed to boo, but it still was a bit surprising that Horford, who played the first nine seasons of his NBA career with the Hawks, received this reception:

And those boos kept going and going and going…

To be fair, though, the Hawks played a video tribute for Horford between the first and second quarters, and while there still were some boos at the start, he received a standing ovation afterward.

Thumbnail photo via Greg M. Cooper/USA TODAY Sports Images