The Germany legend has surprisingly stated that he does not know of the Spain international, but is confident he will do well at Bayern
The Spain international has continually been linked with a move to the Bundesliga giants, and club president Uli Hoeness recently gave the transfer the green light.
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"But he must be good if Bayern are interested in signing him. He has to be a special player, or Bayern would not have been after him.
"Of course, he is pretty expensive. But what's the difference really when you're talking about €30 million (£23.6m) or €40m (£31.4m)? Bayern can afford a transfer like this."
Javi Martinez, 23, has a €40m buy-out clause in his contract with Bilbao, and Bayern are seemingly ready to splash the cash on the midfielder.
Bayern Munich won the DFL-Supercup against Borussia Dortmund on August 12, and begin their Bundesliga campaign against Greuther Furth on August 25.