The Japan international was watched by Manchester United boss Sir Alex Ferguson in Saturday's cup final victory where he played a key role and revelled in glory post-game
The 23-year-old has come under intense scrutiny in recent weeks as Manchester United prepares to make an offer, and manager Sir Alex Fergeson was spotted in the stands, but the player himself would only discuss his remarkable performance following his team's successful double.
"We were able to get a bigger lead than I expected," Kagawa told reporters. "But then again I expected a shoot-out.
"When I scored the first goal I didn't think we'd be able to defend the lead easily, because Bayern had a strong attack."
The Japan international praised the fans who came out to watch another tough battle between the two German heavyweights.
"You don't get this opportunity every day," Kagawa continued. "So it was a great experience and Im even more glad to have won."
Meanwhile, his Dortmund team-mates clearly hoped that Kagawa would stay another year as the team attempts to claim a third consecutive league title.
"We talk to him and tell him that we would be very happy if he stay with us," Marcel Schmelzer told reporters when asked about the transfer rumours that have also seen Kagawa's name attached to clubs such as Arsenal, Tottenham and Milan.
"I hope he makes the right decision and thinks about that," said Mats Hummels. "I wish him all the best."