Six of Celtic's next seven matches are outside of home.
With the Europa League behind them, Celtic are now staring down a season-defining fortnight.
By 14 March, they could be motoring in the league with the wind at their backs and through to the Scottish Cup last four.
Alternatively, they might find themselves still struggling to defend their title and staring at a trophyless campaign.
The initial challenge is Ibrox on Sunday for a huge league encounter, with Celtic trailing Rangers by a couple of points after playing one match fewer, with Hearts six clear of the title holders.
This is followed by a midweek trip to Aberdeen, before heading back to Ibrox in the Scottish Cup last eight and then welcoming high-flying and tough Motherwell.
Six of their next seven fixtures are away from Celtic Park. This much-maligned Celtic group is about to be stress-tested after a rollercoaster opening months of the season.
"There will be a lot of twists and turns," stated a former Celtic defender. "It wouldn't shock me if the league goes to the final day. But they will have to do it over the coming handful of games. You have to be utterly consistent, otherwise they will not win the trophies."
O'Neill Now Has Selection 'Conundrum'
Although the victory over Stuttgart being ultimately irrelevant in Celtic's quest to reach the knockout stages of the Europa League, it could still turn out to be important.
The manager rotated a large number of his first eleven and some of the squad members put in eye-catching displays to claim the club's maiden win in Germany.
Luke McCowan stroked home the winner after under half a minute and was a positive influence, while in the defence, several defenders stood out in a gutsy performance.
Murray especially stated his claim to start next to Liam Scales. A superb defensive intervention stood out and he was assured when defending corners.
But the most talked-about display was saved for back-up goalkeeper Viljami Sinisalo as he contributed significantly in a long-awaited shutout in six matches.
The established goalkeeper has been under heavy criticism after a series of errors. The Finnish stepped in and made six saves, in a display labeled "perfect" by a former Celtic midfielder.
A former Celtic goalkeeper believes Sinisalo performed well 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. "The manager has a tough call to make at the weekend. On that performance, I would be starting him. Give him a run in the team now."
The Celtic manager conceded that a number of individuals have given him "food for thought".
"[Sinisalo] was outstanding in the game, exceptionally. That's the name all round the dressing room," the manager commented. "He's got a lot of talent."
Viljami Sinisalo staked his claim to be in the lineup against Rangers on Sunday.
'Critical' Rangers Challenge Lies Ahead
The additional positive of Celtic's win was that they showed they can grind out a victory.
Historically, Celtic have arrived and naturally looked to dominate the ball from start to finish against every domestic opponent.
But this less robust side had looked more and more susceptible in recent times, regularly letting in more than one goal per game.
Having not won at Ibrox in their last four visits and given Rangers have won their past 10 home matches, a demonstration of toughness in Germany was well-timed.
Might Celtic take a somewhat more cautious approach? At this moment, it is all about winning.
"You don't need to have most of the ball to win the game," observed an pundit. "You've got to work hard, be solid at the back, get a bit of luck and have a reliable shot-stopper."
"Celtic have struggled for form this season, but they are hanging in there [in the league]. They still have a chance, with a match to spare. The players will pick up great confidence from tonight - the weekend will be a critical one."
