Former Tottenham goalkeeper Radek Cerny believes his ex-club are feeling the aftershock of the departures of Robbie Keane and Dimitar Berbatov.
Strike duo Keane and Berbatov joined Liverpool and Manchester United, respectively, in the summer and Spurs have since struggled.
The White Hart Lane outfit have made their worst start to a Premier League season and sit bottom of the table after recording two points from five games.
And Cerny, now at Queens Park Rangers, feels his former employers are suffering the loss of the combined total of 30 goals provided by Keane and Berbatov last season.
"Two big strikers like Berbatov and Keane, who can easily score 20 goals a season, are difficult to replace," Cerny told Sky Sports News.
Meanwhile, Cerny - who made 16 appearances for Spurs while on loan from Slavia Prague between 2005 and 2008 - has backed Heurelho Gomes to become a success in North London.
Gomes is the current Tottenham No.1 after joining from PSV Eindhoven, but the Brazilian has come in for criticism after errors in the recent defeat to Aston Villa.
Cerny, though, has compared Gomes to former Manchester United goalkeeper Fabien Barthez, who was known for combining brilliance with blunders.
"He is a very good goalkeeper," Cerny added when asked about Gomes.
"It is like somebody told me about Fabien Barthez, he is a big goalkeeper and sometimes he makes big mistakes."