Had little to do but commanded his penalty area and communicated well with his defence.
Made some key interceptions and read the game well.
The stand-in skipper led his team into the group stages as his experience and know-how proved decisive.
Looks sinister with his Travis Bickle haircut but is quickly gaining a soft spot in the hearts of Arsenal fans. Solid in defence and dovetailed well with Oxlade-Chamberlain on the right flank but sent off in the 75th minute after receiving a second yellow card.
Steady, unflustered and composed. Made some important interceptions and used the ball sensibly.
Hectored, cajoled controlled and ran his socks. Never pretty but pretty effective.
Slotted in well in his favourite No10 role. Should have done better with an early shot but involved in most of Arsenal's best moments.
Drove his team forward with an inspirational display. Created Arsenal's opener with a smart give-and-go and made a series of clever passes. But there was also a reminder of his recklessness with a wild challenge that should have resulted in a Besiktas penalty.
Claims his creative spark comes from his Turkish heritage but, against a team from the land of his parents, looked flat and mostly innocuous.
Looked like the player we saw in the World Cup after he put a quiet start behind him with his first Arsenal goal. Ran Besiktas ragged in the second half with his pace and purpose, and could have had a hat-trick had he been more composed in front of goal.
Provided pace and zip on the right flank and always provided an outlet.
Made some fine saves and prevented a deluge of second-half Arsenal goals.
Made some strong forward runs and dealt capably with Ozil.
Looked comfortable on the ball but lost his opponent on a few occasions.
Struggled to deal with the pace and zip of Oxlade-Chamberlain at times but comfortable on the ball and unfortunate not to win a penalty after being upended by Wilshere.
Helped keep Sanchez quiet in the first half and made some important interceptions as Arsenal surged forward after the break.
Absent through injury in the first leg and showed why he was missed with a commanding display at the base of the midfield.
Had a point to prove against his former and, although over-zealous at times, was instrumental in most of his team's best play.
Energy and endeavour in the central acres.
Struggled to impose himself and was subbed just after the hour mark.
The liveliest of the Besiktas attackers gave Arsenal some scares with his touch and movement.
Provided a threat with his pace and physical presence but wasted his team's two best chances, including an excellent one late on.