The Netherlands international was cruelly robbed of the chance to represent his country at Euro 2020 when he was forced to pull out of the squad on the eve of the tournament due to injury.
The groin problem meant he has been unable to feature in the two pre-season friendlies to date, against Derby County and QPR.
However, with Wednesday's first warm-up game at Old Trafford against Brentford on the horizon, Donny has been back training with a view to getting some minutes under his belt in pre-season.
The 24-year-old will be hoping for more opportunities in 2021/22, having had more chance to bed into life in Manchester and the Premier League.