The biggest game of another packed Premier League weekend arrives at Old Trafford on Saturday evening, and with it a whole host of questions that need answering.
Manchester United and Chelsea have both failed to hit the ground running after two very different summer transfer windows, yet both retain hopes of challenging for the title in what could be the most open race we've seen in years.
But with just 14 points between them from nine games, Ole Gunnar Solskjaer and Frank Lampard know they must find consistency in terms of performances and results. And they must do it fast.
Manchester United and Chelsea meet at Old Trafford in the weekend's biggest top-flight game
Both managers have plenty of options at their disposal this weekend, and it is likely that their team selections will have a major impact on how the game pans out - and who comes away with a much-needed win.
For United, the role of Paul Pogba remains a big talking point, while Solskjaer must also decide whether to throw any of his new boys in at the deep end. For Chelsea, defensive concerns must be addressed, but Lampard does have a big decision to make in attack, too.
Here, Sportsmail takes a closer look at the tactical decisions facing both bosses as they look to kick-start their league campaigns with victory over a top four rival.
THE POGBA CONUNDRUM
When fully fit and on form, Pogba walks into Manchester United's starting XI and has a reasonable case for being regarded as one of Solskjaer's most important players.
But while he finally seems to be over the injury issues which plagued him for much of the previous campaign, the Frenchman has flattered to deceive on the pitch.
After a dismal display in the humiliating 6-1 defeat by Spurs, Pogba has begun the last two games - away at Newcastle and PSG - on the bench. United won both, scoring six goals in the process.
Paul Pogba has found himself out of favour and on the bench for United's last two matches
But it's not just Pogba's mediocre performances which have led to him being dropped by Solskjaer in recent weeks. It's a question of balance.
While the idea of the former Juventus star combining beautifully with Bruno Fernandes sounds good on paper, having two such attack-minded players in a midfield three hasn't always worked.
Against Newcastle and PSG, Solskjaer opted for Scott McTominay and Fred behind Fernandes in a bid to protect his defence and give his side a more stable base on which to build from.
Although it may have been a slightly negative tactic at St James' Park, it worked a treat in Paris this week and it would be a surprise to see the Norwegian abandon it against a side with the attacking quality of Chelsea.
For Pogba, that is likely to mean another place on the bench. If he's in the mood, his energy and vision could be key in the latter stages of the game.
Fred (left) and Scott McTominay work together to dispossess Neymar against PSG this week
ZIYECH READY FOR ACTION
Having signed for Chelsea way back in February of this year, the last eight months must have been among the most frustrating of Hakim Ziyech's life so far.
The Moroccan winger had his arrival at Stamford Bridge delayed by the coronavirus pandemic, and then picked up an injury in a friendly against Brighton in late August.
Hakim Ziyech could make his first start for Chelsea after two substitute appearances
He has made only