Chelsea maintained their unbeaten start to the season with a fourth consecutive win
At a glance
Chelsea score three goals in opening 15 minutes
Aggie Beever-Jones nets fourth WSL goal in as many games
West Ham's Ines Belloumou sent off for hair pull
Chelsea scored three goals in seven minutes to maintain their unbeaten start to the Women's Super League season by thrashing 10-player West Ham.
Aggie Beever-Jones opened the scoring in the eighth minute with a brilliant free-kick from the edge of the box into the top corner for her fourth goal in as many league games.
Sweden international Johanna Rytting Kaneryd scored the second four minutes later after she was left completely free in the box to tap home Wieke Kaptein's low cross.
And Chelsea's third followed in the 15th minute when Erin Cuthbert let fly from 20 yards to leave Kinga Szemik helpless in the West Ham goal.
To compound the home side's misery, Algeria full-back Ines Belloumou - making her first start for the Hammers - was shown a straight red card in the 23rd minute for pulling American forward Alyssa Thompson's hair.
With 20 minutes left, Catarina Macario crossed low into the path of Kaptein who stabbed home as Chelsea made it four WSL wins from the opening four games.
It sent them back to the top of the table, two points clear of Manchester United who beat Liverpool earlier on Sunday.
Rehanne Skinner's West Ham remain pointless and rooted to the bottom of the table.
Chelsea analysis: Blues continue superb start
Once Chelsea went ahead, there was only destined to be one winner.
In their most convincing performance of the season so far, they ended the game as a contest after just 15 minutes and handed a further advantage when Belloumou was dismissed.
Even before the goal blitz, Cuthbert had a shot from the edge of the box palmed away by Szemik and Kiera Walsh sent an effort from distance over the bar.
Chelsea's attacking threat proved too much for a dismal West Ham side with Kaptein having a shot blocked and also hitting the post before the break.
More chances followed as the lively Macario sent a fierce strike against the post, while fellow substitute Sam Kerr's angled effort was well saved by the legs of Szemik in the closing stages.
While the Blues scored four goals in a game for the first time since April against Crystal Palace, it should have been more against the Hammers.
With 12 points from a possible 12, it is clear, though, that Sonia Bompastor's defending champions have another WSL title firmly in their sights.
Player of the match
After the opportunity to rate players has closed, the score displayed represents the average from all the submissions by BBC Sport users.
