South Korea coach Dick Advocaat struggled to find anything positive to say about his side's 3-1 defeat against Ghana in a World Cup warm-up match in Edinburgh on Sunday.

An Asamoah Gyan spot-kick gave Ghana a 1-0 interval lead, but Lee Eul-yong levelled with a spectacular long-range strike shortly after the restart.

However, the Koreans struggled to get to grips with the physical approach of their opponents and it was no surprise when the Black Stars regained the lead through Sulley Muntari in the 62nd minute.

Chelsea midfielder Michael Essien made certain of victory with a simple finish 20 minutes later.

A disgruntled Advocaat said: "Attack, midfield, defence, there wasn't a single good point tonight.

"Game by game our team play has been getting worse and that is very disappointing.

"It was a well deserved win for Ghana, they were the better side. We have played a few teams in our preparation but they have been the best.

"They were fighting and we have to cope with that. I like to see the physical side, teams who want to win the ball. But players like Essien and Stephen Appiah make the difference.

"Hopefully we have learned a lot from the game."

There was more bad news for South Korea when Kim Jin-kyu hobbled off clutching the back of his right leg in the 51st minute.

The 21-year-old will undergo tests early this week to ascertain whether he will be fit enough to play in the Group G opener against Togo on June 13.