As most of the transfer speculation at Celtic surrounds whether or not Matt O’Riley will be at the club beyond the summer, the Hoops midfielder could be forgiven if he saw a drop in performance whilst on the US Tour. O’Riley has been linked to 10 clubs so far as some of Europe’s top clubs chase his signature but, thankfully, the Celtic hero hasn’t seemed too distracted by all that noise. Captaining Celtic during their 4-0 win over DC United, O’Riley looked calm and relaxed and far from a player who seems as if he is even considering leaving the club. And after starring in last night’s 4-3 win …