Tokyo: Japan's Shinji Kagawa has vowed to prove his worth to new Manchester United boss Louis van Gaal after a disappointing World Cup plunged his future into further doubt.
"I feel incredibly excited," Kagawa told reporters at Tokyo's Haneda airport on Thursday before leaving for England.
"It's a new start and I feel re-energised. It's up to the players to get the results we need. I have a strong desire to do well."