Lewandowski was at Bayern Munich for 8 seasons, so it will be difficult for Sadio Mane to reach the game that Lewandowski gave Bayern Munich.
Let's take a look at Lewandowski's first season with Bayern Munich on a free transfer from Borussia Dortmund. He played 31 times and scored 17 goals, now Sadio Mane has only played 14 matches and scored 6 goals, he still has a chance to match Lewandowski's goal or even exceed it in his first season.
This is a comparable game in my opinion than comparing Lewandowski's contribution in his last season to Sadio Mane's in his first.
It seems too fast and the fans' expectations are high for the performance of Sadio Mane because still in the first season and have 15 matches only. I think Sadio Mane's performance isn't too bad, it's just that the fans' expectations are too big and it doesn't give Mane time and space to prove his capacity as the best player at the moment. From 14 appearances with Bayern Munich in the Bundesliga, Sadio Mane has managed to score 6 goals and 3 goals in the Champions League from 6 appearances.
I don't think bad performance with 9 goals scored at Bundesliga and Champion because comparison with Lewandowski still need adapted for the first season in Bayern Munich.
They Will have to suffer quite a lot because of selling Robert Lewandowski. They basically do not have any player in the team right now who can score goals at any given time in the match.
Yes, Bayern Munich said that they will bring good strikers into the team. And who did they bring in? Sadio Mané, who is the winger? This is going to cost them in the Champions League. And they still do not have any striker currently in the team who is actually reliable. I think they will have to be happy with just the Bundesliga title this season.
The first thing that comes to my mind is that Robert Lewandowski was a central striker, and Sadio Mané is a winger, and you can never replace a striker with a winger.
There is no doubt that Sadio Mané has scored quite a few goals, to be precise, he has scored 9 goals. However, matching the tally of Lewandowski is going to be really hard because a few seasons back that guy scored a whopping 41 goals in one season, which was the highest ever goal scored in the Bundesliga.
I really think that they should bring in a new striker in the next transfer window, otherwise, they will suffer quite a lot in the champions league if they don't do that.