Lewandowski is a priority for Barcelona in this summer transfer window, although the Bavarians are making it difficult for the Catalan side to make their wish come true.
"He wants to prove that he is better than Benzema, it's another reason [he wants] to go to Barcelona," Cezary Kucharski told Radio Ser.
Despite the fact that he has a contract with Bayern Munich until June 2023, his former agent believes that the deal will eventually go through.
"Barcelona and Lewandowski are going to fight for this signing," he said.
"I think he's going to sign for Barcelona, I think it's possible."
Kucharski also revealed that after his time in LaLiga Santander, Lewandowski wants to head to MLS in the United States.
"He has to put pressure on Bayern to release him from his contract," he said. "The Bayern officials know that he wanted to go to Spain.
"His plan was Germany, then Spain and to finish his career in the United States," he said.