Scott McKenna, Aaron Hickey and Lewis Ferguson did not take part in Scotland's group training on Sunday.The trio instead did individual work at the Scots' base in Charlotte, North Carolina, as Steve Clarke's men prepare for their final World Cup Group C game against Brazil on Wednesday.Right-back Hickey came off in the 1-0 win over Haiti and was absent for the 1-0 defeat by Morocco on Friday at the Boston stadium.Centre-back McKenna has been managing a calf complaint and has yet to feature while