Leverkusen won 1-0 at Signal Iduna Park on Saturday to move six points clear of their third-placed opponents in the Bundesliga.
However, Hyypia's men head into their final Champions League Group A game at Real Sociedad knowing victory may not be enough to secure qualification for the knockout stages.
Assessing his side's task in a pre-match press conference, Leverkusen coach Hyypia said: "We gained lots of confidence from the Dortmund game. We want to keep up the momentum.
"We need to play with the same intensity."
Leverkusen will qualify with a draw against Sociedad if Shakhtar are beaten on Tuesday, due to the German team's superior head-to-head record against Mircea Lucescu's men.
"They (Sociedad) want to show they belong in the Champions League and they won't need much motivation," said the 26-year-old.
"We've got to carry on where we left off in the Dortmund game and give 100 per cent - and then hope Man United can do us a favour."
