Our assistant boss is expecting a tough battle against a Baggies outfit desperate to stay in the Premiership.
John said: "The fans have been great and hopefully they'll be right behind us again and inspire us because these are the games we need them.
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"Birmingham's fans were fantastic and when they conceded a goal, you'd have thought they'd have scored because they raised the roof. They certainly inspired the team.
"We need our fans on Sunday. It will be difficult, don't expect a walkover, but if the fans are behind us it could be another great day."
John added that the lads are determined to put a run together to stay in and around the top six.
"We've had a win and a draw and now we need another win," he said.
"It's very tight in the league at the moment and three points can take you into a great position but a loss can take you into mid-table.
"It's very important that we stay up there."
John Gorman has called on the Spurs fans to inspire the lads to victory against West Brom at the Lane on Sunday.