Pierre-Emerick Aubameyang was spotted in London on Thursday evening as he closed in on a £12m deadline-day move to Chelsea.
The 33-year-old Barcelona forward jetted into the capital for his medical ahead of a £12million move.
Talks over the Gabon striker have been ongoing for weeks and the Blues have long been optimistic of their chances of getting a deal done.
But there is now a race against time to thrash out an agreement with Barcelona before the 11pm deadline.