The 28-year old USA forward spent three months with Bayern in early 2009 and many critics believe it was a bad move but Klinsmann, who was boss at the time, believes Donovan has benefited from his time at the Allianz Arena.
"It was absolutely not a disappointment, it was Landon taking a big risk coming in for three months, knowing ahead of him is Luca Toni, Miro Klose and Lukas Podolski," Klinsmann said. "He made a lot out of it. You know, I was not agreeing with the board that he was sent back home, and was not agreeing with a lot of things."
Donovan's loan deal was not extended by Bayern officials despite calls from Klinsmann to keep him on.
"They didn't want to give him the time," he said. "And it made me sad in a certain way, but made him I think even stronger. Now it's his momentum this World Cup."