Root has struggled mostly against Cummins & Hazelwood, and with both of them missing the first test, and I suspect a few more tests, he has his best chance to score a century and go big in this series. He needs to be careful of Boland though, someone who has troubled him in Australia in the past. England's best chance to win the Ashes as well.
My prediction:
Most Runs: Brook/Root
Most Wickets: Boland
Result: England Win (3-2) or Draw (2-2)