"I am not going to get drawn into saying too much", Horner told Sky Sports following Verstappen's retirement, "but we pay multi-millions of pounds for these engines, for a first-class product, a state-of-the-art product, and you can see it is quite clearly some way below that".
"Then Q2 and the rain came, the first guy on the track was getting the best track, we needed to get the first lap in and [Lance] Stroll spun in front of that so I had to abort that lap".
Despite the frustration, Verstappen said on Instagram Monday that he regrets the language he used.
As his auto slowed and he dropped down the order, the Dutchman opened up his radio channel to say: "Can I not just go ahead, I don't f--ing care if this engine blows up".More news: Trump slams billionaire conservative Koch brothers as "total joke" in GOP
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"We're also the slowest out there", he added. "It's hard to accept". It's a shame they beeped it away, it would have been better if they had allowed it.
Following that session Ricciardo was asked if the summer break was coming at a good or bad time given his recent run of misfortune, to which he replied: "I think a good time".
"I mean I was like 25 seconds ahead [of Ricciardo] because of the starting position I was in, and I felt okay with the auto".
The Australian changed from the intermediate tyre to wets late in the session but it was too little too late as he was unable to get into Q3. For sure the first week I'm not really enjoying it because of the end of your last race, but that's how it is.
"I guess that's why you hear Bono's [Peter Bonnington, Hamilton's race engineer] voice afterwards, because it was so nerve-wracking for them. I was happy today, happy to finish and get some points and have a race I feel I maximized".