"Paul regards family life as very important.
"He knows the travelling with the international team is tremendous and coming to his age, I think he felt it was time to give more time to his family. That is the reason he gave up international football.
"His form this season has been absolutely fantastic and now we are getting him back fresh after a little break."
Louis Saha and Ole Gunnar Solskjaer are also expected to return on Saturday.
"I'm not in control of who succeeds me and there are many people who'd want my job, but I've got a few years left yet."