Steve Bruce expects Andre Green’s imminent Pompey switch to benefit the winger’s development.
The Blues are expected to tie up a season-long loan for the 20-year-old within the next 24 hours.
Green, who can operate on the left wing or as a number 10, is highly-regarded by the Championship club.
However, the loan arrivals of wingers Anwar El Ghazi and Yannick Bolasie have knocked him down the pecking order.
And Villa boss Bruce believes a period at Fratton Park can help Green.
Bruce told the Birmingham Mail: ‘I've decided to let him (Green) go and get some games under his belt.
‘After signing the recent (wingers) it will benefit him.
‘I hope he goes and becomes a big success. We will then see how he is in January.’
Green missed a large chuck of last season through injury, yet has made five appearances this season, including two starts.