Manchester United manager Ole Gunnar Solskjaer believes football is a "different game" this season as a mix of controversial rule changes and unprecedented circumstances throw up wild results.
A week after a Premier League-record 44 goals were scored across a single weekend, there was more drama as Leicester won 5-2 at Manchester City, Chelsea came from 3-0 down to draw 3-3 at West Brom, and United were awarded a penalty after the final whistle had sounded to win 3-2 at Brighton.
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Debate has raged over changes to the handball rule which have seen several penalties awarded, but Solskjaer said the effects of an off-season curtailed by the coronavirus pandemic are also being felt as games continue in empty stadiums.
"I think football has changed," the United boss said. "There are no fans, it's a different game. Pre-season we were at different stages, the new handball rule... you never know what's going to happen."
Tottenham head coach Jose Mourinho stormed down the tunnel after Newcastle were awarded a stoppage-time penalty for handball on Sunday, 24 hours after Crystal Palace boss Roy Hodgson fumed over the spot-kick given to Everton in the Toffees' 2-1 win.
A week earlier, Palace got a penalty of their own at Old Trafford when another handball decision went against Victor Lindelof, and Solskjaer added his voice to those unhappy with the changes.
"You can discuss it all day long but we need some clarity on what's a foul and what's a penalty because now it looks like you can chip the ball up into someone's hand - like what happened to us against Palace for example and Victor got a penalty against him.
"And then the header against Tottenham, he's [Eric Dier] got no idea the ball hits him. You see the goals scored against West Brom at the end, is that not handball [by Kai Havertz in the build-up]? We need to get that clarity. It's a whole spectrum of things that aren't normal."
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United were more than a little fortunate to get their first three-point haul of the season at the weekend, with Brighton hitting the frame of the goal five times, levelling in stoppage time but then conceding a penalty for handball in the very last action of the game.
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"You can look back at the performance, especially in the last 20-25 minutes when we didn't really get hold of the ball and control the game when we were winning 2-1," Solskjaer said.
"But then again it's three points - the reaction after conceding was fantastic and there are some positives. We've got to be happy. I don't think too many teams will have a comfortable ride down there."
United will be back at the Amex Stadium on Wednesday night for their fourth-round meeting with Brighton in the Carabao Cup - live on Sky Sports Football - although Saturday's match probably offers few pointers with both sides expected to make a raft of changes.
"You can see teams have a cup team and a league team and we'll make changes," Solskjaer said. "It'll be very similar to what happened last week against Luton."
Solskjaer made 10 changes for last week's 3-0 win over Luton in the previous round, though two of United's goals came late on from substitutes Marcus Rashford and Mason Greenwood.
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One player who will not be involved is Andreas Pereira, who is set to join Lazio on loan.
The 24-year-old made 40 appearances for United last season but found opportunities limited after the arrival of Bruno Fernandes.
A deal for Pereira to join the Serie A club is close, with the Italians expected to pay his full wages for the duration of the loan.
Manchester United have had a bid for Jadon Sancho worth up to £91.3m (€100m) rejected by Borussia Dortmund.
The offer was for an initial £73m, rising to up to £91.3m, which fell short of Dortmund's £108m valuation.
Sancho has not flown with the rest of the Dortmund squad for the German Super Cup in Munich against Bayern due to a "respiratory infection". He has tested negative for Covid-19.
A bid was expected from the Premier League club this week, but all of the noises coming from Dortmund would suggest that Sancho is staying in Germany.
Summer transfer window - key dates and times
The summer transfer window closes at 11pm on Monday October 5 with a feast of activity lined up on Transfer Deadline Day on Sky Sports News and across our Sky Sports platforms.
A domestic-only window for deals between the Premier League and EFL then runs from October 5 and closes on Friday October 16 at 5pm. Follow all the news and analysis on SSN and across Sky Sports' digital platforms, including with our dedicated Transfer Centre blog.