The 30-year-old sustained the damage to his right leg in a last-ditch tackle on Victor Anichebe in the first half of the 2-0 victory and Coyle confirmed he expects Knight to be missing for between four and six weeks.
The Trotters manager said: "When somebody receives an injury, it opens the door for someone else.
"David's stepped into the breach and he's showed the quality we believe he has. That's why we brought him to the football club."
Source: PA
Source: PA