Park Chu-young of Watford in England's second-tier Championship League on Thursday appeared in public for the first time since he returned to Korea.
Park quietly came to Korea early this month to get treatment for cellulitis.
Just ahead of training in Paju on Thursday, he said, "I'm not in perfect shape, but I'm well enough to resume training.
He pledged to focus on getting in good enough shape to give faith to all players in the final squad for the World Cup, even though it remains to be seen if he will be on the final roster for the event in Brazil.
"I discussed everything with Watford and Arsenal before I came to Korea," Park added. "We agreed that I'll focus on rehab in Korea until May 3, when the season ends, and then discuss things further if Watford advances to the playoffs for promotion to the Premier League."
Watford is in 12th place in the Championship with 60 points from 15 wins, 15 draws, and 13 losses, with three games remaining. It is seven points behind Reading, which is sitting in sixth place, the last possible spot for the playoffs.
Park donated W100 million to the Korean Red Cross to help victims of the ferry disaster.