Steve Bruce has hailed Fraizer Campbell's mental strength after revealing the striker could return from injury three months earlier than scheduled.
The Black Cats front-man sustained a second cruciate ligament injury in April and was initially set to miss most of this season while he recovered.
But the Stadium of Light boss has admitted Campbell is poised to make his comeback within the next five weeks, highlighting the striker's determination and dedication to return to fitness as 'quite remarkable'.
"Fraizer is just remarkable," Bruce told the Daily Mirror.
"We hope that by Christmas he can be involved in the first team again. It's a quite remarkable achievement.
"It's testament to all the hard work he's done. If you'd seen the running he's doing, you'd just say 'Wow'.
"He's had two cruciate injuries, but he looks brand new and full of life. There's no sign of any limp or any deficiency.
"Mentally, he's had to be really strong. At the time of his injury, he'd had a wonderful pre-season and scored four against Hull.
"He was the main striker, playing as well as anybody here, and he's been a miss."