Formula One reconvenes after its summer break at Belgium's magnificent Spa-Francorchamps track today with the 2017 season finely poised - on many different levels.
On the face of it, this race and the one a week later on the equally historic Monza track in Italy gives Lewis Hamilton a chance to gain back some ground on Ferrari's Sebastian Vettel in the championship, after the German's carefully controlled victory in Hungary at the end of July.
And there are a number of other pressing matters - particularly the resolution of next year's driver market and McLaren's engine supply - that will guarantee an intriguing few weeks as a backdrop to the title fight.
Ferrari vs Mercedes - stage is set
With four wins each so far in 11 races, it is hard to pick a favourite out of Vettel and Hamilton, at least when it comes to a potential champion. Today at Spa, though, might be a different matter.
Although Mercedes and Ferrari have generally been closely matched this season, there have been outlier tracks where one has had a bigger advantage than normal, and the 6.9km of magnificent asphalt that swoops around the Ardennes mountains is expected to be one of them.
With a collection of largely long-duration, medium- and high-speed corners, Spa could have been made for the standard-setting aerodynamic efficiency and horsepower of this year's Mercedes car - in much the same way as one could have said of Silverstone in England, where Hamilton dominated.
'Schumi' memories coming back
The same, for slightly different reasons, goes for Monza and as such these two races give Hamilton a golden opportunity to reduce Vettel's 14-point lead. And he needs to, because Singapore, two weeks after Monza, is as close to a Ferrari "gimme" as you can get.
As such, Hamilton needs to have located his "A" game over the summer break - something that has eluded him too many times this season, after disappointing performances in one way or another in Russia, Monaco, Austria and Hungary this season.
Today marks 25 years since Michael Schumacher's first win in Formula One. He would later go on to say the circuit was "far and away my favourite track".
Four races out of 11 in which he has failed to get the best possible result for his car is too high a ratio for Hamilton to win the championship against opposition as strong as Vettel in this year's Ferrari.
Spa has been a mixed hunting ground for both title contenders - each has won there only twice.
Remember the underdogs
And Vettel has his own concerns - Spa is his teammate Kimi Raikkonen's favourite track and the Finn could well be Ferrari's pacesetter today.
In such circumstances, Vettel would be glad for Ferrari's clear - if unspoken - philosophy of favouring the four-time champion in pretty much every possible way, a strategy Mercedes are choosing not to follow with Hamilton and teammate Valtteri Bottas.
Elsewhere, there will be interest in how close Red Bull can get to the frontrunners on a track that exposes the power limitations of their Renault engine but where the chassis can be expected to excel around the succession of demanding sweepers that make up the middle sector of the lap.
And McLaren - after a rare weekend as best of the rest in Hungary, delivering Fernando Alonso a sixth-place finish and an unexpected fastest lap - will be steeling themselves for another difficult weekend.
A Honda engine upgrade is due in Spa - at least that's the word; Honda have not yet publicly said it will be there. Will it amount to much?
It needs to, not least because McLaren are leaning heavily towards dropping Honda for next season and switching to a Renault customer deal. If this update is underwhelming or late - and the last one was both - could it be the end of the road for the McLaren-Honda partnership, and by extension Honda's latest sojourn into Formula One?..