Arsenal boss Arsene Wenger has urged fans to stay with them.
Some 9,000 Gunners fans had made the journey to Manchester United on Sunday, many of whom had also just returned from a bitterly disappointing midweek trip to Spain.
"The fans were absolutely amazing, and we need them at West Brom now," Wenger told Arsenal TV Online.
"Hopefully they keep cheering us and keep the morale as well because we have to support each other now in that final part of the season, because it is a vital part.
"The team has put a lot of effort in, but we have to focus on our next challenge - and that is the Premier League.
"We have to regroup and show we are mentally strong."
