A total of six of Celtic's next seven fixtures are away from home.
Now their European journey is over, Celtic now face a campaign-altering two-week spell.
Come mid-March, they might be cruising in the title race with the momentum on their side and into the Scottish Cup semi-finals.
Alternatively, they could be further toiling to retain the championship and staring at a trophyless campaign.
The first stop is Ibrox on Sunday for a titanic league clash, with Celtic behind Rangers by two points having played one game fewer, with Hearts six clear of the champions.
This is followed by a midweek trip to Aberdeen, before heading back to Ibrox in the Scottish Cup last eight and then welcoming in-form and formidable Motherwell.
Six of their next seven fixtures are away from Celtic Park. This much-maligned Celtic squad is set to be stress-tested after a rollercoaster opening months of the season.
"We can expect a lot of surprises and changes," stated a ex-Celtic player. "I wouldn't be surprised if the league is decided on the final day. But they must prove themselves over the next five or six games. You have to be utterly consistent, or else they will not win the trophies."
O'Neill Now Has Selection 'Conundrum'
Although the victory over Stuttgart proving moot in Celtic's quest to reach the knockout stages of the Europa League, it could still turn out to be significant.
The manager changed a large number of his starting line-up and some of the fringe players put in eye-catching performances to secure the club's first ever win in Germany.
Luke McCowan stroked home the winner after under half a minute and played positively, while in the defence, several defenders excelled in a gutsy display.
Murray in particular stated his claim to start next to Liam Scales. A superb block was notable and he was assured when dealing with set-pieces.
But the most discussed performance was delivered by back-up goalkeeper Viljami Sinisalo as he played his part in a first Celtic clean sheet in half a dozen games.
The established goalkeeper has faced heavy criticism after a series of errors. The Finnish was called upon and made six saves, in a display labeled "flawless" by a club legend.
A club goalkeeping great believes Sinisalo did enough to start against Rangers on Sunday.
"He had some very good saves and looked composed when he had the ball and read the game well," he said. "It's a big decision to make at the weekend. Based on that showing, I would be giving him the nod. Give him a run in the team now."
The Celtic manager agreed that a number of individuals have given him "plenty to consider".
"[Sinisalo] played brilliantly in the game, exceptionally. That's the name all round the dressing room," the manager said. "He's got a lot of talent."
Viljami Sinisalo made a strong case to start against Rangers on Sunday.
'Pivotal' Rangers Challenge Awaits
The other benefit of Celtic's win was that they showed they can grind out a victory.
Historically, Celtic have arrived and typically sought to control possession from the first whistle to the last against every domestic opponent.
But this more fragile side had looked increasingly vulnerable this year, regularly conceding more than one goal per game.
Having not won at Ibrox in their last four visits and given Rangers have won their last ten home matches, a show of resilience in Germany was timely.
Might Celtic take a slightly more pragmatic approach? Right now, it is solely concerning winning.
"You don't have to have most of the ball to win the game," noted an pundit. "You've got to work hard, defend well, get a bit of luck and have a good goalkeeper."
"Celtic have not played well this season, but they are still in contention [in the league]. They still have a chance, with a match to spare. The players will take great confidence from tonight - the weekend will be a critical one."
