Arsenal moved into seventh place in the Premier League with a 2-0 victory over West Brom on Monday. Alexandre Lacazette scored twice in that victory.
Tony Pulis' side won the last meeting between these teams in March and had their chances to claim at least a share of the spoils, with Jay Rodriguez hitting the post and Jake Livermore failing to convert the rebound before Lacazette headed in the opener.
Aaron Ramsey earned a penalty in the second half which was converted by Arsenal's French recruit with aplomb.
Gareth Barry made a record 633rd Premier League appearance in that game.