Chelsea rounded off a whirlwind transfer window with the signing of Pierre-Emerick Aubameyang from Barcelona, reuniting the striker with Thomas Tuchel, under whom he had thrived at Borussia Dortmund.

The Aubameyang deal was valued at €14m (£12m) and took Chelsea’s outlay on incoming fees under the new co-owner Todd Boehly to more than £250m.

The left-back Marcos Alonso departed by mutual consent, clearing the way for him to move in the opposite direction to Barcelona.

“It’s an honour to be part of this team and I can’t wait to start,” Aubameyang said. “I have some unfinished business with the Premier League so it’s good to be back and really exciting.”

Aubameyang and his family were the targets of an armed burglary at their home in Barcelona last weekend. The thugs attacked Aubameyang, damaging his jaw – an injury that could delay his Chelsea debut.

Alonso has been keen on joining Barcelona for months but talks stalled amid Barcelona's financial issues with Chelsea holding out for a fee in the region of £8m.

Barcelona wanted around £20m for Aubameyang and so a compromise has finally been reached to allow both players to make their desired moves.