Australia took an early lead in cricket's oldest regular international series when it rallied from 122/8 in the first innings to win the first Ashes test by a huge 251 runs against England on Monday.
The teams meet at Lord's for the second of five tests starting Aug. 14.
Here's what we have learned so far:
England proved in the first test in Birmingham that it can get Australia batting great Steve Smith out — but only when he's in his 140s.
To stand any chance of regaining the Ashes, England needs to find some way of getting Smith out or, worst case, keep him in only double figures.
And if that doesn't work, slow him down as it tries to get the rest of Australia out.
The former Australia captain admitted he had enjoyed "a dream comeback" as he marked his first test in more than a year following suspension for his role in the ball-tampering scandal in South Africa last year.
Ashes tests are intense encounters but fielders and batters from England and Australia appeared united in one thing: they didn't trust the umpiring decisions.
Always a tough job, with leg-before-wicket decisions notoriously tricky, umpire Joel Wilson from Trinidad tied the test match record for the most decisions overturned by the Decision Review System — eight.
Social media reaction was unforgiving. Former England captain Michael Vaughan tweeted: "When Joel Wilson gives you OUT .. You just review it .. #Fact."
Wilson will be the TV umpire for the second test at Lord's, and stand in the third test at Headingley, but has no involvement in the final two games at Old Trafford and The Oval.
Can England hope that archrival Australia will get over-confident after gaining some revenge over the same opponents for its semi-final exit from the Cricket World Cup at Edgbaston last month?
No, according to Australia captain Tim Paine.
England confirmed on Tuesday that Anderson, its record test-wicket taker, will miss the second test with an injured right calf.
Anderson and out-of-form spinner Moeen Ali could make way for paceman Jofra Archer, if fit himself, and slow left-armer Jack Leach.
Root oversaw a 4-0 defeat Down Under in 2017-18.
Edgbaston is seen as England's most hostile venue for cricketing visitors with its raucous football-style atmosphere.
That continued in the first test with Smith, David Warner and Cameron Bancroft — the three Australians involved in the ball-tampering scandal against South Africa last year — singled out for endless jeers from the crowd.
The Australians claimed their first triumph at Warwickshire's ground since 2001 — the last time they won the Ashes urn on English soil.
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