Inter Milan midfielder Patrick Vieira believes he'll be back in action a month before schedule.

"If everything goes well I will start playing again around the middle of January," Vieira, who has struggled with calf injury, said.

"We have to go to Dubai for 10 days and then I will be back to competitive football. I'm starting from scratch - it's like pre-season preparations.

"The wait has been long and difficult because of recurring injuries. I would have preferred to know the exact duration of my unavailability. There is nothing worse than having to wait each time.

"You just have to take it on the chin and be patient with it and tell yourself that it will all be fine and you will be on form for Euro 2008."