By Ameenu Shardow
Follow on Twitter @alooameenu
Ghana defender Daniel Opare is an injury doubt for the international friendly against South Korea on Monday.
The 23-year-old trained alone on Sunday evening as a â€˜precautionâ€™ with a slight muscle problem according to the Ghana FA.
"So far, we've had no problems. We have just one muscle problem," Black Stars coach Kwesi Appiah said as he confirmed Opare's slight worry.
It is unclear if the full back will be fit enough to play in Ghanaâ€™s final warm up game against South Korea on Monday ahead of the 2014 World Cup.
Opare is the only injury concern for the Black Stars as they come to the end of their training program in the USA.
The Black Stars are expected to arrive in Brazil on Wednesday ahead of their opening Group G game against the USA next Monday in Natal.