Berger came through his first match of his season in the reserves' 4-1 home thrashing of Derby County in midweek.
"It's encouraging to see him back in action", said the Villa boss. "If Patrik can recapture the form he showed at the end of last season, he can play a big part for us. I have no doubts about that.
"That's why we extended his contract, because he showed he was still capable of playing such good stuff."