Garner is yet to appear for United this pre-season due to a slight injury, although he is now back in full training.
Hannibal was an unused substitute for our opening games with Liverpool and Melbourne Victory, but came on after 66 minutes of the win over Crystal Palace at the MCG.
Erik said that he needed more time to work with Garner during training before making a decision on how he utilises him this season, following his impressive loan spell with Nottingham Forest.
He also added that Hannibal had been impressing in training.
"James Garner just integrated in training this week so I haven't seen him, I don't have a full impression, I want to see more and then we will make decisions,” Ten Hag told reporters.