Grujic signed for Hertha on Sunday in a season-long loan and had his first training session yesterday.
Hertha coach Pal Dardai said, "Marko can do very well on the ball, makes good vertical passes and, above all, has a really good shot.
"Marko has to arrive first, integrate into the team, understand the language better and learn. It's all new to him. It would be great if he can get going in two weeks."
For his part, Grujic stated: "I can play as a six, but I also like being an eight from the penalty area to the penalty area. In England, I've been working a lot on my defensive skills, but earlier in Serbia I've been more aggressive and an attacking midfielder."