Red Bull Formula 1 boss Christian Horner says he has a "sour taste" with Ferrari’s continued performance slump showin🦋g it was hit hard by its controversial engine settlement with the FIA.

A number of power unit-related clarifications issued over the winter have re🐼ined in Ferrari’s previous straightline advantage that it enjoyed for much of the 2019 season and 🍌left the Italian squad battling in the midfield.

Ferrari has openly admitted that the private settlement it reached with the FIA aftꦆer pre-season testing in February has resulted in a significanꦅt loss in competitiveness.

Horner says the sꦗituation has “left quite a sour taste” and believes that 𝓡Red Bull could have won the races which Ferrari triumphed in last year.

“The whole thing has left quite a sour taste,” Horner replied when aske♉d if the situation was frus💮trating.

“I mean obviously you can draw your own conclusions from Ferrari's curre🔯nt performance but, yeah, there are race꧙s that we should have won last year arguably if they had run with an engine that seems to be quite different to what performance that they had last year.”

Ferrari’s struggles continued throughout the Belgian Grand Prix weekend as Sebastian Vettel could only finish 13th, ahead of teammate Charleඣs Leclerc. Both drivers were beaten by the Ferrari-powered Alfa Romeo of Kimi Raikkonen.

It marked a huge contrast from last y🦩ear’s race at Spa, which Ferrari dominated as Leclerꦑc claimed his maiden F1 victory.

“It's ob🌜viously very tough for them but I think their focus has obviously been in the wrong areas in previous years, which is why they're obviously seem to be struggling a little with whatever🎀 was in that agreement,” Horner added.

“I think you've got Mercedes as a clear leader, then I think Honda and Renault are reasonably close depending on circuits and conditions. And then you've got Ferrari obviously 💎at the back of the queue.”