The England batsmen struck five half-centuries on their way to a 192-run victory in a four-day warm-up match against Cricket Australia XI. "This is the first time I've seen him up close over a long period of overs".
"I m sure he would have preferred to have scored a few, but a guy with that experience has been through periods (like that) before", he said.
Harris, who was coaching the CA XI and will be part of his country's back-room staff for the Ashes, also confirmed Australia will target Root when the series starts. It was attritional at times but that's the game we had to play.
"Whether there's potential to leave a little bit more grass on it (the pitch) that would make it easier to take 20 wickets, which is what you want for good Test match cricket".
James Anderson, Stuart Broad and Chris Woakes appear to be England s front-line pace attack heading into the series but Ball and Craig Overton are pressing their claims.
On his chances of cracking a spot in the England Test XI, Overton said: "You're never quite sure, you just keep on doing your thing and try not to worry about it too much".
England have summoned another fast bowler for their Ashes tour of Australia after Jake Ball suffered an ankle strain which places him in doubt for the first Test, starting in less than two weeks. It was a measure of how they repelled all challenges that Australian captain Rachael Haynes called on the part-time efforts of Nicole Bolton, Elyse Villani and herself to get to the second new ball for a last push.
The players of England and Australia, both men and women, came out to the field wearing a poppy on their jersey on Saturday to honour the sacrifices made on the anniversary of the end of the First World War. "I'll be ready if I'm called upon".