Defender Sal Zizzo could be sidelined for as much as a month. (Christopher Hanewinckel-USA TODAY Sports)

ATLANTA – Atlanta United Thursday announced that defender Sal Zizzo had successful surgery to repair a torn meniscus in his right knee and will miss three-to-four months.

Zizzo, a former Red Bull, suffered the injury during training.

Atlanta United (14-4-5, 47 points) will return to action when it hosts Toronto FC at Mercedes-Benz Stadium on Saturday at 4 p.m. (ESPN, Sports Radio 92-9 The Game).