The young pair were in the matchday squad for this week's 1-1 draw with Tottenham.
Asked if he was impressed with the pair as an addition to their matchday squad, Hasenhuttl told the Daily Echo: “Absolutely.
“We need every player at the moment so they are training with us all the time now.
“It can happen that we, sooner or later, get a chance for them. This is what we need."
He continued: “For some players, it (the FA Cup) is a good opportunity I think to make first steps in the team and we will have a look."
Saints meet Swansea City in the FA Cup third round next week.
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