Fernando Alonso thinks Ferrari has been left behind by its rivals in the 2010 development race.
The Spaniard won his first race with the famous Maranello based team this season, raising hopes that Ferrari was set to cast off its miserable 2009 campaign with a strong challenge for the world championship.
But after a particularly weak showing in Turkey recently, Alonso is quoted by the latest edition of France's Auto Hebdo: "The F10 has not changed since the Chinese grand prix.
"Apart from the blown wing (F-duct), which has not delivered everything that we expected, and has monopolised the efforts of the aero engineers, there has been nothing new.
"Except in Bahrain, we have been only defending, not attacking.
"I hope things will go better from Valencia, where the F10 should appear in a very advanced B specification.
"We are putting everything into this programme, knowing that the gap between us and Red Bull and McLaren is wide," added the 28-year-old.
His teammate Felipe Massa, meanwhile, is quoted as suggesting the long straights and slow corners in Montreal this weekend should prove a happier hunting-ground for the F10.