I think it's natural that many Barcelona fans are doubtful about Robert Lewandowski's performance next season already over 37 years old, but looking his performance in this season very quit well by scoring 42 goals all competition. I don't think easily how to find central forward have consistent performance by scoring over 42 goals one season but Lewandowski show us his quite well performance. Recent transfer activities, Barcelona still not sign yet new central forward and likely Hansi Flick keep fully believing Robert Lewandowski become main central forward for next season.
Lets see how many goals scoring by Lewandowski and will lead La Liga top scorer after failure in this season and remaining 4 goals from Kylian Mbappe who scored 31 goals.
Barcelona already got Lewandowski very fortunately as a free player and also got a lot of considerable contributions from him, but it is right time for them to seriously consider of possible replacements on Lewandowski. They must do it as soon as possible in order to give replacement players (strikers) enough adaptation time in the club such as at least one season.
Lewandowski with his high professionality will possibly perform well for Barcelona next season, though his very old age contains risk of sudden performance decline and higher vulnerability of injuries, even severe ones. In addition, old players like Lewandowski need more recovery time from injuries than young players and there is possibility of missing many appearances too.