took on Paul McGrath's old club, St Patrick's in Dublin on Saturday afternoon as they ran out 4-0 winners.
It proved to be a routine warm-up before heading off to Japan
this week as they step up pre-season.
Rob Draper analyses what clues could be gleaned for Frank Lampard's first season in charge.
Mason mounts his bid for selection
Obviously you have to calibrate judgements in pre-season friendlies for the quality of the opposition, in this case the fifth best team in the League of Ireland.
Even so, Mason Mount, 20, who played the first half, looked like a man who spots the glimmer of an opportunity and is determined to seize it.
He has the confidence of the manager – his loan spell at Derby worked out well in that respect – and was on set pieces and corners. And his delivery was excellent. However, what impressed was his energy around the pitch and his incisive passing. If Lampard is playing a high press, Mount is his man.
His passing was equally good, a ninth minute through ball for Barkley between the lines the pick of a series of potential assists. At the very least he is playing himself into the starting line-up for the Japan tour next week.
The Batman Returns
Michy Batshuayi won Chelsea the Premier League in 2017 – well, he scored the decisive goal that secured the title, anyway – but has had a peripatetic existence ever since with mixed loan spells at Borussia Dortmund, Valencia and Crystal Palace.
But maybe, just maybe, there is a way back at Chelsea, given the transfer ban.
It's not like the club are over blessed with centre forwards. And here he looked sharper and readier to impose himself than Tammy Abraham, his rival for the second striker slot after Olivier Giroud.
At the very least, his focus and determination demonstrated that he wants to make an impression on Lampard.
The defensive conundrum: Tomori egdes ahead
David Luiz looked to be thoroughly enjoying the time and space afforded him in the first half yet the major question is who will line up alongside him while Antonio Rudiger is recovering from injury.
Lampard started Fikayo Tomori with him in the first half, maybe trying to build a relationship between the two. He's another benefiting from playing under Lampard and Jody Morris at Derby.
He did well, look assured but really there was no threat whatsoever.
Andreas Christensen, who would be considered higher up the pecking order, came on in the second half and played with Kurt Zouma, who will surely be moved on or be resigned to being fifth choice. Tomori did himself no harm but the line ups against Kawasaki Frontale and Barcelona will provide more clues.
Diamonds aren't forever
Insofar as you can establish tactical insights, Lampard's Chelsea will press aggressively high up the pitch.
Suffice to say that will be harder to do in the Super Cup against Liverpool than against St Patrick's.
Lampard played the first half with a diamond midfield, Ross Barkley at the tip and Jorginho at the base, with Mount and Mateo Kovacic central.
It's hard to see that being a regular feature give the proliferation of wide players Chelsea possess in Christian Pulisic, Callum Hudson-Odoi, Pedro and Willian.
In the second half, when all 11 players were swapped, they started 4-2-3-1 and switched pretty quickly to 4-3-3. That feels more like the shape we'll see on tour and at the start of the season.
One for the future?
It's become the kiss of death at Chelsea, the sobriquet bestowed on the likes Josh McEachran, Dominic Solanke, Nathaniel Chalobah (all fine professionals, just not at Chelsea's level).
Yet Billy Gilmour, 18, a Glaswegian signed from Rangers two years ago, looked assured and composed in a second half midfielder. He's small – 5'7' – but feisty and not easily intimated.
He also played the second half against Bohemians on Wednesday. Lampard kept him here rather than send him home for the Under-23 match on Saturday, so he's made an impression.
'He has had a brilliant trip and has shown real personality in this trip,' said Lampard. I just hope Billy keeps pushing on with that this season.'
A season on loan in the Championship surely beckons. It is to be hoped he won't get lost in the black hole of Chelsea's youth development but eventually step up to the first team.