Michael Ballack feels Bastian Schweinsteiger would suit Manchester United should he chose to leave Bayern Munich.
Schweinsteiger was one of the stars of last summer's World Cup and his contract with Bayern expires in 2012.
Ballack, 34, left the German giants for Chelsea in 2006 before returning to his homeland this year for a second stint with Bayer Leverkusen.
And although he believes Bayern's ambitions could still be big enough to keep hold of Schweinsteiger, he has backed the 26-year-old midfielder to succeed at another of Europe's elite clubs such as United or Real Madrid should he chose to try his luck abroad.
Reaching his peak
"He has taken on the responsibility placed in him and is now in a phase when he is looking to reach the zenith of his career," Ballack told Kicker magazine.
"He took a huge step forwards at the World Cup. He has presence, authority, personality, performance and goals - he has everything.
"Only he will be able to feel what is right for him for the future.
"Of course, every footballer is attracted to certain things and Bastian will feel these also. But there are not that many big clubs around and Bayern is one of them.
"On the other hand, Real or Man United are both attractive and he would fit in well at both clubs."