Arsenal confirmed the signing of David Luiz after the transfer window had slammed shut on a hectic deadline day.
The Gunners agreed on a £8million transfer fee with Chelsea for the centre-back, who has reunited with manager Unai Emery after working together at Paris Saint-Germain.
The transfer window closed at 5pm on Thursday - and three hours later, Luiz was announced as an Arsenal signing.
The reason Arsenal were able to sign the player late was because they filled a deadline day deal sheet, given them until 7pm to finalise the deal.
A total of six deal sheets were submitted ahead of the 5pm deadline.
Luiz skipped training at Cobham on Wednesday as he attempted to push through a move away from Chelsea.
Frank Lampard made it clear Luiz wasn't going to be in his long term plans at Stamford Bridge.
Upon signing him for Arsenal, manager Emery said: "David has huge experience and I look forward to working with him again.
"He is a well known player and adds to our defensive strength."
Luiz only penned a new two-year contract at Stamford Bridge earlier this year, having impressed under Maurizio Sarri last term.
But after being an unused substitute in last weekend's final pre-season friendly against Borussia Monchengladbach, he feared being only a bit-part player under new boss Frank Lampard.
Kurt Zouma and Andreas Christensen are expected to start the campaign as Chelsea's first-choice pairing, with Germany international Antonio Rudiger soon set to return from injury also, leaving 32-year-old Luiz as fourth choice.
That uncertainty no doubt played a role in his decision to move to north London, and the deal was finally confirmed on Thursday night.
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