The Swedish striker says that his team-mates will have to be ready to make a step up in class, while Javier Pastore, equally, is anticipating a tough game in Germany next week
The Swedish striker bagged the second goal as the Ligue 1 leaders cruised to a 3-0 victory that moved them eight points clear of Monaco at the top of table - for the time being at least.
However, with PSG now set to travel to Germany for the first leg of their Champions League last-16 tie with Leverkusen on Tuesday, Ibrahimovic - who struggled with a minor back problem against Valenciennes - has urged his team-mates to brace themselves for a significant step up in quality.
"It was important to win and we did what we had to do. The next match in the Champions League will be totally different," the 32-year-old was quoted as saying by L'Equipe.
"We have a few days to recover. [My back] feels so-so. Physically, it will be a different game in Leverkusen.
"We must stay concentrated and play our game."
Midfielder Javier Pastore also admitted he was thrilled to put more pressure on Monaco in the race for the Ligue 1 title but described Tuesday's game against Leverkusen as PSG's most important of the month.
"It's great to get three points for our long duel with Monaco," said the Argentine. "I played 90 minutes, I feel like I'm improving, I hope to gain more playing time.
"Leverkusen will probably be the most important match in February. I hope we win to make the return leg easier."