Manchester City assumed the Premier League lead on goal difference after Liverpoolâs 100 per cent start was ended at Chelsea. All three are unbeaten, while Manchester United are floundering.
Here, Press Association Sport looks at these and other talking points from the weekendâs action in the Premier League.
Mourinhoâs bubble burst?
West Ham on Saturday inflicted Manchester Unitedâs third loss in seven games for the Red Devilsâ worst start since 1989-90, piling further pressure on boss Jose Mourinho. Former United players Rio Ferdinand and Paul Scholes have warned of further deterioration.
Ferdinand told BT Sport: âYou canât let a situation like this continue throughout the season â wars in the press, leaks, players on one side of the dressing room, Mourinho and his staff on the other. If that continues this will be one of the worst seasons in the clubâs history.â Games with Valencia and Newcastle before the international break could be crucial for Mourinhoâs future.
Can Chelsea sustain title challenge?
While Mourinho is embattled and United are reeling, his former club Chelsea are apparently revived under Maurizio Sarri, a 59-year-old former banker. The enjoyment is back at Stamford Bridge and the Blues ended Liverpoolâs 100 per cent start on Saturday â and were within a few minutes of inflicting the Redsâ first loss.
Sarri says Chelsea are closer to Liverpool and holders Manchester City than he thought, but still maintained a top-four finish must be the objective, playing down his sideâs title prospects.
Gunners growing under Unai
Monday marks 22 years since Arsene Wenger took charge at Arsenal and the Frenchmanâs former team appear resurgent under his successor Unai Emery. The Gunners have now won seven successive games â five of them in the league â under the Basque, who succeeded Wenger in the summer.
There will continue to be teething problems in the transition, but the signs are now promising after Saturdayâs 2-0 win over Watford.
Clear candidates for relegation battle
Newcastle, Cardiff and Huddersfield remain without a win this season. Fulham, Southampton and Brighton have just one each. There already appears to be a gap at the bottom.
West Ham have proved a few wins can result in an elevation up the table, while Wolvesâ strong start shows not all newly-promoted clubs need to be in trouble. For those bottom seven, they need to string together positive results swiftly.
Silva lining?
Evertonâs urgency to muscle their way into the Premier Leagueâs elite has been underscored in recent years by a series of rash managerial appointments. After four games without a win, some were even beginning to grumble about Goodisonâs current incumbent, Marco Silva.
But his sideâs second-half performance against Fulham suggested Silva and Everton could belatedly be on the right track towards attaining the kind of status they understandably crave.