Ipswich Town midfielder Grant Ward will be out for nine months after rupturing his anterior cruciate knee ligament in their defeat by Queens Park Rangers.
The 24-year-old was injured in a challenge for the ball in the second half of Wednesday's defeat and left the pitch on a stretcher.
"He will see a specialist tomorrow and we will be guided from there," physio Matt Byard told the club website.
"It's a complete rupture of the cruciate in his left knee."
He continued: "With that type of injury, you are looking around a nine-month recovery period."
Ward joined the Tractor Boys from Tottenham Hotspur on a three-year deal in August 2016 and has made 98 appearances for the club.