What happened: The 20-year-old center back sustained the injury during training. He had moved directly into Chicago's starting lineup for the season opener.
Why it matters: His absence leaves Chicago without a first-choice defender for the closing playoff push. The club must reshape its central defense for the remaining regular-season schedule.
By the numbers: Chicago entered August fourth in the Eastern Conference with 26 points from 16 matches: eight wins, two draws and six losses.
What to watch: Chicago's next lineup will show how the club redistributes minutes in central defense.