Ally McCoist was full of praise for one Arsenal star tonight in their Premier League win against Chelsea. The Gunners built from Saturday’s victory against Wolves with a massive result at the Emirates Stadium as the likes of Martin Odegaard, Kai Havertz and Ben White stole the show in north London with a 5-0 win. It was an improved performance from Mikel Arteta’s side after hitting something of a slump in recent games against Aston Villa and Bayern Munich, with Arsenal tonight going three points clear of Liverpool at the top of the Premier League. And McCoist was impressed with one Arsenal pla…