England and Australia resume their Ashes battle at Headingley on Thursday morning, ready to test the theory that Steve Smith is the difference between the two sides.
Smith is a notable absentee from the third Specsavers Test, having scored 378 runs in three innings before Jofra Archer's 92mph bouncer left him with a concussion and possibly changed the course of the series.
Without his runs and resolute crease occupation, Australia's 1-0 series lead might easily have been reversed and the hosts must now take advantage of his absence as they bid to level the score in Leeds.
The first matter of business will be a final concussion check of their own - batsman Jason Roy requiring a final check-up after being hit on the helmet by a throw down while netting on Tuesday.
His Surrey team-mate Ollie Pope has been summoned on a standby basis following his unbeaten double century against Hampshire, but England do not anticipate any change in Roy's condition.
Follow updates from Headingley below.
