Manchester United midfielder Shinji Kagawa says former teammates at Borussia Dortmund are acting as an inspiration.

Kagawa insists he is not jealous of BVB after they reached the Champions League final.

"I want to play better in the Champions League next season because I have been inspired to see Dortmund make it to the final," he said.

"I've followed how they are doing and have kept in touch with some of the players."