Celtic captain Callum McGregor can do no wrong at the minute after scoring three goals in his opening four Scottish Premiership matches. The 31-year-old decided to retire from international duty during the summer after holding talks with Steve Clarke over his Scotland future. This has given him time to breathe ahead of the Bhoys’ return against Heart of Midlothian tomorrow. However, you’d have paid a pretty penny to hear the thoughts of the Tartan Army boss after the month McGregor had in August, which ended with him being awarded the Scottish Premiership Player of the Month award. It isn’t a …