Chelsea's terrible start to the English Premier League football season has plumbed new depths with the defending champions losing 2-1 at West Ham United.
Chelsea manager Jose Mourinho was banished from the dugout and midfielder Nemanja Matic was sent off.
Arsenal went to the top of the competition with a 2-1 win over Everton. But the Gunners were pipped for first place on goal difference after Manchester City drew 0-0 with cross-town rivals Manchester United at Old Trafford.
Mourinho, who was fined $100,000 last week for his comments about referees following Chelsea's defeat by Southampton, has been involved in other controversies this season and found himself back in trouble at half-time.
He asked referee Jon Moss for a meeting after Matic was sent off for two yellow cards and Cesc Fabregas had a goal disallowed for offside but instead Moss sent him to the stands.
The Portuguese went to sit in the directors box, but left eight minutes before the match ended.
With 10 matches played, Chelsea have lost five times, two more than in the whole of last season when they won the title.
They are 15th in the standings with 11 points.
Leicester City, another unfamiliar name near the top of the table, stayed fifth with a 1-0 over Crystal Palace.
Swansea City won 2-1 at Aston Villa, West Bromwich Albion beat Norwich City 1-0 and Watford were 2-0 victors at Stoke City.