The 28-year-old has been struggling with a knee problem and have undergone a major knee surgery in the US.
“I am going to come back stronger and hopefully add a couple more years to my career,” Hargreaves told the Manchester Evening News.
Hargreaves is not expected to be back in action until the summer.
“It has been frustrating at times, I don’t really watch our games because as an athlete, and being so competitive, it is hard to watch when you would normally be out there,” he added.