#1 David Luiz
David Luiz was a deadline-day arrival at Arsenal during the summer, with the 32-year-old arriving to shore up what has been a problematic area for the Gunners.
The Brazilian has earned unfavourable reviews for his defensive lapses over the years and he did not do too much to improve that reputation, as Arsenal failed to keep a clean sheet in any of the first six matches he played for the club.
However, for all of his defensive shortcomings, the former Brazilian international is extremely good with the ball which makes him suited to the tactical demands of Unai Emery.
Having drawn blanks in his first seven matches in all competitions for the Gunners, Luiz finally opened his account against Bournemouth, rising highest to head home a Nicolas Pepe corner in the ninth minute.
He also discharged his duties effectively at the other end, helping Arsenal to only their second clean sheet of the season.