As England tomorrow embark on the first of five one-day internationals against Australia, looking not only to get that Ashes result out of their system but also to continue preparations for next year's World Cup, Bayliss is in a odd position.
Toss: Eoin Morgan, the England captain, won the toss and opted to bowl against Australia in the first One-Day International at Melbourne Cricket Ground on Sunday (January 14).
BBC Sport looks at why England can be considered favourites to win the series less than two years on from their miserable World Cup showing.
Chris Woakes is the only bowler likely to be in the XI for the first ODI staying on from the Test series, but Jake Ball and Tom Curran are also in the squad.
WHEN England appointed Trevor Bayliss it was to achieve success in white-ball cricket as much as anything else.
The coach has been criticised for overseeing just 15 victories in 38 Tests at the helm, but has proved far more successful in the shorter formats by guiding the team to the final of the World Twenty20 in 2016 and the 2017 ICC Champions Trophy semifinals.
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The make-up of the English attack is different, with Mark Wood, Liam Plunkett and Adil Rashid all arriving to try their luck. During the same period, Australia reached 300 12 times in 50 matches, including 10 out of 23 matches batting first.
"I know they had a hard run with weather in the Champions Trophy, they didn't even complete a full game against us, and certainly that was a struggle for them".
Plunkett took 3-71 and Rashid 2-73, while Mark Wood snared the prized wicket of opener David Warner for two in his 10-over spell of 1-49.
The Test skipper was forced to retire ill on day five of the final Ashes Test in Sydney due to a bad case of gastroenteritis that had seen him hospitalised prior to the start of play. "It's not often you get free rein and ambition to be as adventurous as you like". "The middle order is a key area for us to focus on".
Bayliss has said since the Ashes that he will stand down when his contract expires in September 2019. More importantly, the wickets that we've played on, we've adapted to them. But they're a very strong team, certainly at home.
From an Australia perspective, the build-up to the series has been dominated by debate over a player not in the team.
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Meanwhile, a lot of talks has gone on between the selection of Glenn Maxwell and Smith's comments surrounding his training methods.
Maxwell, who averages 32 with the bat and nearly 39 with the ball, was again overlooked for 34-year-old Cameron White when Chris Lynn was forced out through injury.
"That tournament had quite a significant role for us, really", he said. "It is astonishing - he would be my first player on the team sheet".
Australia rode it without further casualties as England's Ashes nemesis Steve Smith pierced the gaps to ease into the 20s.
"England have got to find a way to stop Smith scoring, let alone get him out, while David Warner and Aaron Finch are world-class top-order batsmen, and they've got Mitch Starc and Pat Cummins and Josh Hazlewood in form".
They had been rocked early on when for the first time this winter England confronted them with genuine pace.
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"The Australians became the world champions here at the MCG three years ago, so it will be a great test for us as a side".