Robert Lewandowski is an"exceptional" striker and can rightly be compared to Barcelona superstar Lionel Messi according to Bayern Munich legend Lothar Matthaus.
Lewandowski is already attracting interest from Spanish and European champions Real Madrid and other top clubs; including Chelsea.
Changing agents by the Pole has fuelled speculation the more of his impending move even as he has scored 20 goals in as many starts for Bayern in the Bundesliga this season.
The 29-year-old has netted more than 100 goals since arriving from German rivals Borussia Dortmund in 2014,
while helping deliver three Bundesliga titles among others.
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And former Bayern captain Matthaus hailed the importance of Lewandowski at the Allianz Arena, likening the Poland international to five-time Ballon d'Or winner Messi.
"'Lewy' makes a difference, he cannot be replaced," Matthaus said via the Bundesliga's official website.
"Robert is an important figure in Munich like Messi is in Barcelona. However, when Messi gets injured, the image of the Catalan game changes completely. Bayern does not have this problem.
"Lewandowski is a key player, but the team is not as set up for him as the Real Madrid game under [Cristiano] Ronaldo or the tactics of PSG under Neymar."
"Lewandowski really is an exceptional player," Matthaus continued.
"Lewandowski does not have an alternate who guarantees the same quality. The Pole is currently the best nine in the world. Bayern will not find another player like that."
With Nigeria coming up against Poland in an international friendly next month, many are keen to see how the Super Eagles defenders will fare against a top gun like Lewandowski.