Tottenham tore apart Manchester United for a 6-1 victory on Sunday, exposing the defensive weaknesses in Ole Gunnar Solskjær's side by inflicting the team's joint-heaviest Premier League defeat at home.
Only once since 1930 has United conceded six at home - to Manchester City nine years ago. Not since 1986 has United opened the league season with back-to-back home losses.
This was a crushing defeat to a Tottenham side managed by Jose Mourinho, who was fired in 2018 to make way for Solskjær. And against a team that has played eight games in 22 days across three competitions and was trailing after two minutes at Old Trafford.
But after Bruno Fernandes' penalty, United's wretched defense allowed Tanguy Ndombele to level in the fourth minute and Son Heung-Min to net again inside three minutes.
United can be aggrieved that Erik Lamela's apparent playacting led to Anthony Martial being sent off in the 28th minute. But the team was already being run ragged by Tottenham.
Harry Kane scored his first on the half-hour, Son netted again in the 37th, Serge Aurier was on target in the 51st and Kane wrapped up the rout from the penalty spot in the 79th.
Arsenal moved into the Premier League top four as two goals in three minutes saw off Sheffield United 2-1, while Leicester’s perfect start came to a shuddering halt with a 3-0 defeat at home to West Ham.
Liverpool can now leapfrog Leicester to move joint top of the table alongside Merseyside rivals Everton if they win at Aston Villa later on Sunday, while Jose Mourinho takes his Tottenham team to Old Trafford hoping to exact revenge on Manchester United for his sacking nearly two years ago.
Arsenal have taken nine points from their opening four games as they look to return to Champions League football for the first time in five years next season.
But the Gunners were fortunate to take all three points at the Emirates as they had an early escape when David Luiz escaped a red card for a pull on Oli Burke.
Mikel Arteta’s men got going after the break and a fine team move opened the scoring on the hour mark when Bukayo Saka headed home Hector Bellerin’s cross at the far post.
Bellerin was the provider again moments later as Nicolas Pepe drove forward to curl the ball in off the far post.
David McGoldrick halved the deficit seven minutes from time with the Blades first league goal of the season, but they remain without a point.
Arsenal are now level on points with Leicester as the Foxes suffered a huge fall from grace just a week on from thrashing Manchester City 5-2.
West Ham manager David Moyes was again taking charge from home after testing positive for coronavirus.
But just as in a 4-0 win over Wolves last weekend, the Hammers did not miss his presence as goals from Michail Antonio, Pablo Fornals and Jarrod Bowen gave the visitors a full deserved three points.
Antonio’s presence was too much for Leicester to handle and he opened the scoring with a header at the far post from Aaron Cresswell's pin-point cross.