South Korea striker Lee Dong-guk is confident of featuring in Saturday's World Cup opener against Greece after making a speedy recovery from a hamstring injury.

The 32-year-old Pohang Steelers striker, who was the top scorer in the K-League last season, was not expected to be available to coach Huh Jung-moo until at least the second Group B outing against Argentina on June 17. But the former Middlesbrough frontman has made a quicker than expected recovery after suffering the injury last month to hand the Taeguk Warriors a welcome boost.

"I've been exercising normally since arriving in South Africa," he said.