Manager Thomas Frank says Tottenham Hotspur's players and supporters "need each other" and that the club is "nothing without the fans".
Fans at Tottenham Hotspur Stadium booed goalkeeper Guglielmo Vicario after his mistake led to Fulham's second goal in Saturday's 2-1 defeat - Spurs' 10th home league loss of 2025.
The Dane said after the defeat that those who booed Vicario "can't be true Tottenham fans" and called their actions "completely unacceptable".
Tottenham's only Premier League home win under Frank, who joined from Brentford in the summer, was the opening-weekend fixture against Burnley.
Their poor home form has led to Tottenham having just 18 points from 13 games to sit 12th in the league table.
Speaking before his side face Newcastle United, who sit directly below them, on Tuesday (20:15 GMT) at St James' Park, Frank said he understood the disappointment of fans.
"As I said after the game I completely understand the frustration," he said.
"If you don't win there will always be a frustration. That is normal.
"Especially as we haven't won as much as we would have wanted to at home, not only this year but the last long period. So the frustration grows a little bit more.
"We are nothing without the fans. No club is anything without the fans. Tottenham is nothing without our fantastic fans, nothing. We need each other.
"My point is that during matches is where we need each other - where I want to create a fortress.
"If you want to create a fortress, it can only be together - fans, team, me. My job is to make sure we do everything we can to perform - but can we do that together? That is where you create a difficult place to play."