Manchester City, Liverpool, Manchester United and the rest of the Premier League have been handed a warning about Chelsea's attack following the signings of Raheem Sterling Pierre-Emerick Aubameyang.
The Blues have come off the back of a very busy summer transfer window where they spent in excess of £250 million.
Nine new faces came through the door and some statement signings were made as Todd Boehly and the ownership team took charge of their first transfer window since taking over back in May.
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Following the closing of the window, there has also been a change of head coach at Chelsea.
Graham Potter was announced on Thursday after the sacking of Thomas Tuchel just a day before on Wednesday morning following their Champions League defeat to Dinamo Zagreb.
The Englishman will be hoping to make the most of all the new players as he begins to construct his plans at Stamford Bridge.
"Develop a team and culture" - Graham Potter outlines Chelsea vision after head coach appointment
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There was a noticeable focus from the west London side to drastically improve the defence this summer, and the incomings of Kalidou Koulibaly, Marc Cucurella and Wesley Fofana have certainly done that. On top of this though, additions were also wanted up top to bolster the attack.
Having secured Sterling as the first signing of the window, there was a long search for someone to fill the hole in number nine spot.
There was talk of Cristiano Ronaldo heading to west London, but on deadline day the Blues completed a move for former Arsenal striker Pierre-Emerick Aubameyang from Barcelona. With a revamped attack Potter will be hoping he can get the most out of it as possible.
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Graham Potter told to make Chelsea presence and impact after Blues appointment
There is a lot of quality and experience in the new-look attack, and former Chelsea player Pat Nevin has shared his verdict on the front-line.
Speaking to Grosvenor Sport, Nevin said: "Aubameyang isn't the entire solution for Chelsea and I think he should be used as an impact substitute like Cristiano Ronaldo is at Man United.
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"However, I do think that when he plays alongside Sterling and Havertz, they will be a scary front three."
Chelsea have an ever-growing list of number nines who have failed to work out at the club, with the latest being Romelu Lukaku.
After he returned on loan to Inter Milan this summer, the Blues have opted to sign another striker with Premier League experience.
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With the arrival of Potter as well there is also a fresh opportunity for players who may have fallen out of favour with Tuchel.
If players such as Hakim Ziyech and Christian Pulisic are handed more chances and they impress, it would improve the range of options Potter would have at his disposal and it could create an even more dangerous attacking unit.
Topics: Chelsea, Raheem Sterling, Pierre-Emerick Aubameyang, Kai Havertz, Premier League