Even though the pre-season friendly was a behind-closed-doors affair at London Colney, the heavy defeat hit home and sparked an about-turn in form and fortunes for Colin Calderwood’s side.
When reminded about the loss you sense a steely determination among Jacko and his team-mates to put things right now the season proper is up and running.
"Yeah, we all know about that," grimaced Jacko. "But I think it will be a lot different on Monday night to be honest. We’ve given ourselves a chance by winning our opening game and if we can keep that sort of form up then I’m sure we’ll give them a better game than the 6-0.
"We do want to put it right — we were a bit embarrassed by that and are determined to turn it around."
"Jacko’s left peg was put to good use during the course of the pre-season programme, with the England under-18 starlet featuring in a number of roles including left wing-back, central midfield, left midfield and left back. He doesn’t mind one bit, but isn’t too keen on the wing-back position.
He played in a left-back role in the opening night victory over Nottingham Forest, turning in an accomplished performance that would have impressed boss Colin and the watching first team coaching staff.
"I play everywhere," he quipped. "They are just trying me out in different positions I suppose. I prefer playing in midfield. I think that’s my best position myself, but it’s up to them where they play me and they pick the team.
"I thought I did okay at left back. If I’m asked to play there I don’t mind going there and doing a job. You do your best wherever you play so you’ve just got to try and impress wherever you can."
On the energy sapping wing-back role, Johnnie admitted: "You’ve got to get up and down all the time as a wing-back. As a left back at least you’ve got a winger in front of you to help you out with the workload, but you can still getting forward as well.
"Being honest, I’d prefer to play left side of a four than wingback."
One thing is for sure, after a tough warm-up programme, Jacko is happy that league combat has finally begun and started so well with a win over Forest.
"I enjoyed that. It’s much better now it’s league games, much more competitive. It was nice to start with a win because the last few seasons have started with heavy defeats. We had to win on the opening day."
There is one pre-season result that Johnnie Jackson would like to erase from the memory, a 6-0 defeat to Arsenal — and the opportunity comes when the reserves travel to Barnet for their second game of the new campaign.