Eric Addo says the Black Stars must pick up major lessons in concentration from their loss to Japan after they threw away a 2-0 lead against the Asians on Wednesday.Ghana, fresh from reaching the 2010 World Cup looked on course for victory over Japan in an international friendly in Holland before twice throwing away two-goal leads to lose 3-4. Addo who was a second half substitute for John Mensah told KickOffGhana.com that the Black Stars had taken their foot off the pedal after going in front. “Once we were in front, we seemed to slow down and then they completely begun to dominate in midfield. We had chances and should not have lost this game but hopefully we will pick the lessons from this,” he said. “The biggest one I think is that until a game is over you play at your biggest strength, which it is key to concentrate throughout the game.” Addo insist however that despite the loss, the Black Stars players will depart for their various European bases with their confidence intact. “The boys are still in a great mood. They know that you can’t win it all but all of us agree we lost this game because we just did not keep our eye on the ball for 90 minutes.”Source: Kickoff.com