Tottenham defender Cristian Romero has warned Daniel Levy that the club are slipping behind their Premier League rivals due to a lack of investment.
Spurs are 11th in the top-flight after losing 4-3 to rivals Chelsea on Sunday, a defeat which saw them concede two penalties and let an early two-goal lead slip.
Pressure is building on Ange Postecoglou but Mail Sport understands he retains the immediate backing of Levy, although there is an understanding results must improve.
Postecoglou's side have now won just one of their past seven games in all competitions and lost four of them, culminating in a poor start to the season.
Several Spurs managers have paid the price for failing to arrest slumps in form, but Romero believes the hierarchy should place the blame on themselves for failing to splash the cash in comparison to the likes of Manchester City and Liverpool.
Asked if Tottenham were suffering over limited spending and a lack of depth, the centre back told Telemundo Deportes: 'The truth is, I would say no comment, but...
'Manchester City competes every year, you see how Liverpool strengthens its squad, Chelsea strengthens their squad, doesn't do well, strengthens again, and now they're seeing results. Those are the things to imitate.
'You have to realise that something is going wrong, hopefully, they realise it.
'The last few years, it's always the same: first, the players, then the coaching staff changes, and it's always the same people responsible.
'Hopefully, they realise who the true responsible ones are, and we move forward because it's a beautiful club that, with the structure it has, could easily be competing for the title every year.'
Since Postecoglou's arrival in July 2023, Spurs have spent around £350million but have failed to push for trophies. Indeed, since Levy became a member of the board in 2000, the club have won a solitary piece of silverware - the League Cup in 2008.
Romero backed Postecoglou after Sunday's loss, saying: 'He's a great coach. We saw it in the first season. In this second one we've suffered a lot of injuries.
'Players are the first one to be criticised, then if we lose 10 games, the staff can be changed, but nobody talks about what is actually happening.
'We are very happy with this staff, me and my colleagues. We love how they work and the football they try to play. We'll try to move on quickly.'
Postecoglou is the fifth manager, including caretaker bosses, that Romero has played under since arriving at Tottenham in August 2021.