David Luiz has been unveiled by Arsenal following his shock deadline day move from Chelsea.

The Brazil international has joined the Gunners in an £8m deal after training away from the Chelsea first-team on Wednesday and demanded a move across London.

The 32-year-old held fears over his first-team prospects under Lampard at Stamford Bridge and was an unused substitute in Chelsea’s final preseason game, the 2-2 draw with Borussia Monchengladbach on Saturday.

Unai Emery - who worked with Luiz at PSG - 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 joins Kieran Tierney at Arsenal after the Gunners paid a record Scottish transfer fee to sign the left-back from Celtic for £25m.

In Pictures | Arsenal's summer transfer business 21 show all In Pictures | Arsenal's summer transfer business 1/21 Arsenal's summer business Unai Emery has been eager to boost his squad for a top-four push in the Premier League. Getty Images 2/21 IN - Nicolas Pepe (Lille, £72m) Arsenal FC via Getty Images 3/21 IN - Kieran Tierney (Celtic, £25m) Arsenal FC via Getty Images 4/21 IN - David Luiz (Chelsea, £8m) Arsenal FC via Getty Images 5/21 IN - William Saliba (Saint-Etienne, £27m, loaned back) Arsenal FC via Getty Images 6/21 IN - Gabriel Martinelli (Ituano, £6m) Arsenal FC via Getty Images 7/21 IN - Dani Ceballos (Real Madrid, loan) Getty Images 8/21 OUT - Aaron Ramsey (Juventus, free) AFP/Getty Images 9/21 OUT - Alex Iwobi (Everton, £35m) EPA 10/21 OUT - Laurent Koscielny (Bordeaux, £4.6m) Arsenal FC via Getty Images 11/21 OUT - David Ospina (Napoli, £5m) Getty Images 12/21 OUT - Petr Cech (retired) AFP/Getty Images 13/21 OUT - Danny Welbeck (released) Arsenal FC via Getty Images 14/21 OUT - Stephen Lichtsteiner (released) Getty Images 15/21 OUT - Krystian Bielik (Derby, undisclosed) Arsenal FC via Getty Images 16/21 OUT - Carl Jenkinson (Nottingham Forest, undisclosed) Arsenal FC via Getty Images 17/21 OUT - Takuma Asano (Partizan Belgrade, undisclosed) Getty Images 18/21 OUT - Xavier Amaechi (Hamburg, £2.25m) Bongarts/Getty Images 19/21 OUT - Eddie Nketiah (Leeds, loan) Getty Images 20/21 OUT - Henrikh Mkhitaryan (AS Roma, loan) EPA 21/21 OUT - Mohamed Elneny (Besiktas, loan) Elneny follows Nacho Monreal in leaving the Gunners before the European transfer window closes Arsenal FC via Getty Images 1/21 Arsenal's summer business Unai Emery has been eager to boost his squad for a top-four push in the Premier League. Getty Images 2/21 IN - Nicolas Pepe (Lille, £72m) Arsenal FC via Getty Images 3/21 IN - Kieran Tierney (Celtic, £25m) Arsenal FC via Getty Images 4/21 IN - David Luiz (Chelsea, £8m) Arsenal FC via Getty Images 5/21 IN - William Saliba (Saint-Etienne, £27m, loaned back) Arsenal FC via Getty Images 6/21 IN - Gabriel Martinelli (Ituano, £6m) Arsenal FC via Getty Images 7/21 IN - Dani Ceballos (Real Madrid, loan) Getty Images 8/21 OUT - Aaron Ramsey (Juventus, free) AFP/Getty Images 9/21 OUT - Alex Iwobi (Everton, £35m) EPA 10/21 OUT - Laurent Koscielny (Bordeaux, £4.6m) Arsenal FC via Getty Images 11/21 OUT - David Ospina (Napoli, £5m) Getty Images 12/21 OUT - Petr Cech (retired) AFP/Getty Images 13/21 OUT - Danny Welbeck (released) Arsenal FC via Getty Images 14/21 OUT - Stephen Lichtsteiner (released) Getty Images 15/21 OUT - Krystian Bielik (Derby, undisclosed) Arsenal FC via Getty Images 16/21 OUT - Carl Jenkinson (Nottingham Forest, undisclosed) Arsenal FC via Getty Images 17/21 OUT - Takuma Asano (Partizan Belgrade, undisclosed) Getty Images 18/21 OUT - Xavier Amaechi (Hamburg, £2.25m) Bongarts/Getty Images 19/21 OUT - Eddie Nketiah (Leeds, loan) Getty Images 20/21 OUT - Henrikh Mkhitaryan (AS Roma, loan) EPA 21/21 OUT - Mohamed Elneny (Besiktas, loan) Elneny follows Nacho Monreal in leaving the Gunners before the European transfer window closes Arsenal FC via Getty Images

The Gunners have strengthened in all areas of the pitch this summer apart from in goal. Midfielder Dani Ceballos has arrived on loan from Real Madrid while Nicolas Pepe has been brought in for a club record fee from Lille to bolster their forward options.

Arsenal have also signed highly-rated defender William Saliba, who will spend the 2019-20 season back on loan with Saint-Etienne before linking up with his new club next summer.