Alexandre Lacazette continued his impressive start to his Arsenal career with a double against West Brom.
The Frenchman scored in either half as the Gunners continued their recovery from a rocky start to the Premier League season.
He headed home a rebound after Alexis Sanchez's free-kick was palmed on to the bar, and then converted a penalty after Aaron Ramsey was fouled in the box.
Lacazette was replaced by countryman Olivier Giroud late on as his goals ensured Arsene Wenger's men climbed to seventh.
Here, we rate the players from both sides at the Emirates.
ARSENAL
Cech 6
His goal led more charmed life than a snake in a basket
Koscielny 6
Didn't enjoy the scenery when Rodriguez took him for a walk
Mustafi 6
Lucky boy: that foul on J-Rod was a clear penalty
Monreal 8
Terrific goal-line clearance denied Rodriguez certain equaliser
Bellerin 6
Eager as ever to get forward but limited impact in final third
Elneny 6
Brought a pitchfork when tweezers were needed to unpick the lock
Xhaka 5
Quiet and steady, but so is your milkman's float
Kolasinac 7
Adds steel and substance to Gunners' left flank
Ramsey 6
Less effective than of late until he won soft penalty
Sanchez 8 (MOM)
Back on song like jukebox with volume turned up
Lacazette 8
On target at home for third league game in a row
SUBS: Giroud (Lacazette, 83), Ozil (Sanchez, 83), Maitland-Miles (Ramsey, 90)
WEST BROM
Foster 6
Move along, nothing to see here, no alarms, no issues
Nyom 6
Blotted his copybook by conceding penalty
Dawson 6
Robust and resolute in five-man back line. Booked
Hegazy 5
Took no prisoners but there were plenty of fugitives in red
Evans 6
Free-kicks he conceded around box proved costly. Booked
Gibbs 7
Coped admirably on his return to familiar setting
Krychowiak 7
Surges from midfield gave Baggies added value. Booked
Livermore 5
Quietly effective or just plain quiet? Take your pick
Barry 7
Almost decorated his record 633rd Premier League game with a goal
Rodriguez 7
Denied blatant penalty, hit the post and header cleared off line
Robson-Kanu 6
Close but no cigar as Albion's luck deserted them
SUBS: Morrison (Livermore, 63) 5, Rondon (Robson-Kanu, 64) 5, Phillips (Nyom, 74) 6