Rooney struck twice in United's 4-2 Champions League win.
Hyypia, who played against Rooney as a Liverpool defender just a couple of years ago, felt the 27-year-old had much more to offer.
"He showed that he can score good goals," said the Finn.
"He has done it for years and I think he has a few years left.
"To score 200 goals is a good achievement - that's a few more than I scored in my career.
"It looks so easy how he is playing. He is a difficult opponent to play against and he showed today he is a quality player."
For the big stories and the banter follow us on Twitter: @tribalfootball