After winning the Premier League for the last two seasons, Manchester City has lost their ability to beat average teams in the 2019-20 season.
Arsenal 1-0 Bournemouth
Southampton 1-4 Chelsea
Manchester City 0-2 Wolverhampton Wanderers
Newcastle United 1-0 Manchester United
Ole Gunnar Solskjaer's United looked limp losing 1-0 at Newcastle United and are yet to win away from home this Premier League season.
Manchester City lost 2-0 at home to Wolverhampton Wanderers, leaving the Citizens eight points adrift of leaders Liverpool approaching the international break.
Nuno Espirito Santo's side inflicted upon City their first defeat of the season at the Etihad Stadium, while Wolves clinched their biggest win of the campaign to date thanks to Adama Traore's brace.
Frank Lampard's Chelsea secured their fourth straight win after hammering Southampton 4-1 at St. Mary's Stadium, where Christian Pulisic made an impact off the bench in his first league game since August.
Arsenal edged Bournemouth 1-0 at home following David Luiz's decider at the Emirates Stadium, though Unai Emery's side were far from convincing as they climbed to third.
Winner: Nuno Espirito Santo
Wolves took one point from their two league meetings with City last season, but they've already bested that total in 2019-20 following a stunning clean-sheet win at the Etihad on Sunday.
Espirito Santo has the third-best record of any manager to have faced City counterpart Guardiola three times or more.
The visitors' plans looked to have been stunted when midfielder Roman Saiss was forced off through injury after 13 minutes, though replacement Ryan Bennett looked impressive in defense.
Traore was the man of the hour following his brace at the Etihad. The 23-year-old benefited after his manager pushed him forward from wing-back, and the speedster targeted praise at Espirito Santo for the faith placed in him.
That's the other aspect of Wolves' feat that can't be monitored in tactics or tracked. Espirito Santo has built a sense of belief in the squad that has the potential to lift his team far beyond the sum of their parts, though his tactics undeniably played a necessary role.
Following a run of three successive losses in September, Espirito Santo has led Wolves on a run of five games unbeaten and won the last three of those to restore order at Molineux.
Loser: Manchester United's Strikers
Manchester United's attacking philosophies look almost abandoned, with the Red Devils failing to score in their third successive away game Sunday when they lost 1-0 at St. James' Park.
The summer sale of striker Romelu Lukaku looked all the more regrettable after a tame display in the northeast ended with Matthew Longstaff scoring the only goal on his senior Magpies debut.
Marcus Rashford contended with an injury failed to have a shot at goal and was eventually aided by substitute Mason Greenwood, with usual attack partner Anthony Martial still injured.
There is blame way beyond just the strike force, though, as it was indicated how little time Rashford spent even inside the Magpies area.
Solskjaer's side sit 12th in the table and have scored nine goals. Crystal Palace are the only team above them with fewer (eight) goals.
Winner: Chelsea Underdogs
Sunday's trip to Southampton was a bountiful one for those Chelsea players who had previously spent time watching on from the boundaries.
Former academy outcasts Tammy Abraham and Mason Mount each scored to put the Blues in a 2-0 lead. Newly fit N'Golo Kante then netted his second goal in as many league games following Danny Ings' strike for the Saints.
Pulisic made his first appearance in three matches and came off the bench to assist Michy Batshuayi for Chelsea's fourth, with the United States winger having struggled for involvement under Lampard of late.
Lampard will hope Batshuayi's first league goal of the season will help restore some of the Belgian's confidence and remind him he has a role to play for the Blues following this summer's transfer ban.
Chelsea have won back-to-back league games for the first time since Lampard took over, and the club has their band of formerly scorned stars to thank for the latest result.