The winger burst onto the scene with United but struggled for consistency in his debut campaign.
But Giggs thinks his second season can get the best possible start with good performances against Finland and Bulgaria in the Nations League.
He said: "Sometimes the players that don't necessarily play all the time for their clubs, it gives them a chance to get some minutes, try and get some form to go back to their clubs and show them what they can do.
"Perhaps DJ is in that camp. United start a week later but DJ will turn up fit and raring to go, I'm sure.
"He's a player I know well. He had a really good start to his United career but he was not playing regularly towards the end of the season but sometimes in the long run that can help and improve you.
"DJ has always been great when he has come into camp."