Chelsea have secured the signing of Gabonese international striker Pierre-Emerick Aubameyang from Barcelona on the last day of this season's summer transfer window after several talks with the Spanish club.

The Premier League club, who had their initial offer for the 33-year-old rejected, were able to reach an agreement with Barcelona in a €14 million deal, which saw Chelsea left-back Marcos Alonso move to the Spanish club.

Aubameyang becomes Chelsea's eighth summer signing following the arrival of Marc Cucurella, Raheem Sterling, Kalidou Koulibaly, Carney Chukwuemeka, Wesley Fofana, Gabriel Slonina, and Denis Zakaria.

Following his arrival at Stamford Bridge, the gifted forward has claimed that he has unfinished business in the Premier League after leaving Arsenal last year to join Barcelona.

"I am really happy. It is an honour to be a part of this team, and I can't wait to start. I have some "unfinished business" with the premier league, so it is good to be back, and it is exciting. "

Aubameyang's arrival ends Chelsea's search for a striker after missing out on former Bayern Munich goal machine Robert Lewandowski, who joined Barcelona this summer.

He could be crucial in resolving Chelsea's attacking issues this season, as the club has only scored six goals in their first five Premier League games.

Aubameyang had a brilliant career with Arsenal, where he scored 92 goals in 163 appearances across all competitions in five seasons, which gives Chelsea a significant advantage.

He is familiar with Premier League football, which may help him adapt quickly to Thomas Tuchel's squad. The gifted striker will hope for a successful career in the famous blue shirt.

Aubameyang will wear Chelsea's number 9 shirt, previously worn by loaned Romelu Lukaku, who had a poor season before he was transferred to Inter Milan this summer.

The talented center-forward is familiar with Thomas Tuchel, having previously played for the manager at Borrusia Dortmund, which could help him adapt.

Chelsea will travel to East London on Saturday to face West Ham United in the Premier League, and it is unclear whether he will be included in the squad.