Lewandowski scored a remarkable 55 goals for Bayern Munich last term as they won a Bundesliga, DFB-Pokal and Champions League treble -- a triumph he called a "dream come true."
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With the Bundesliga starting later than usual due to the upheaval caused by the coronavirus pandemic, Lewandowski is preparing for Bayern Munich's opener against Schalke on Friday, which comes just 26 days after they beat PSG to win the Champions League.
"For the next season, for every club and every football, it will be maybe the most difficult season in our life. We have almost every three days a game, without a break, it will be difficult," Lewandowski said.
"We have to be ready not only for the football, skills and quality, but also with our body and physical things.
"For everyone in football it will be something we never had in our lives and we have to be ready. I don't know about my goals for the season. I want to try to play my best and to score as many goals as I can, but of course the first place is always the team and winning with the team."
Lewandowski was a front-runner for the Ballon D'Or, but the award was cancelled in July due to COVID-19. The decision angered Bayern Munich CEO Karl-Heinz Rummenigge, but Lewandowski said: "For everyone, the situation was the same, if you see all season what we did, and what I did -- it was an amazing season.
"The year is not yet at the end; I hope something changes in the next few months. It was a spectacular season for us, but who knows what happens in the next two-three months. I stay focused on my job and we'll see what happens. It's important not to think about what you did, but what you can still do."
Lewandowski, 32, is looking to win his fifth-straight Bundesliga title with Bayern Munich, and the club's ninth on the bounce. He has spoken in the past of how much he enjoys spending time in Los Angeles, but he is not entertaining any thoughts of a potential move to Major League Soccer in the future and is instead focused on Bayern Munich.
"I am 32 years old so I don't think about what happens in the next few years as I want to play maybe five or six years longer," Lewandowski added. "For sure that's an option maybe in the future, but now I don't think at all about this.
"I saw a few MLS games because we have a few players from Poland in MLS who play in this league and it's a very interesting league, but I don't think about this. You can see how the league is growing up, and how it'll make the next step and we'll see what happens but now, it's difficult to say anything on that."