FC Copenhagen boss Stale Solbakken admits his side must 'play perfect' to beat Manchester United on Monday.
The two sides will face off in a single-leg Europa League quarter-final in Germany.
Solbakken was a player for Copenhagen when they shocked United in the Champions League 14 years ago, and the former Norway international knows what it will take to advance to the semi-finals.
"In order to do that we have to play perfect," Solbakken said, reflecting on that 1-0 win in November 2006.
"We need a bit of luck. We maybe need a United that doesn't fire on all cylinders. We need to be perfect defensively. We need to take that one or two or three chances we get during a game like this.
"The chances are not great but it's an advantage for us that it's over 90 minutes and not 180 minutes. We have a good feeling. After the season, we managed to get a week break and when the players returned from that we have managed to get a couple of players able to play who have been vital to us before.
"We have a good feeling after the 3-0 victory (against Istanbul Basaksehir) but you shouldn't put your house on us tomorrow. But we will give everything."
