The result means that Hamilton still tops the drivers' championship but sees his lead over Vettel cut to 14 points.
With an average of 809,000 people watching, the telecast was the most-viewed Formula 1 race on cable since the 1995 Italian Grand Prix, which also aired on ESPN and averaged 876,000 viewers.
"We want to compare the two engines in Canada", added Horner, amid reports both Renault and Honda will use upgrades at the Montreal race weekend.
It's clear that if Max Verstappen hadn't have started last, and if Ricciardo's race had been trouble free, such was the Red Bull's advantage in keeping the tyre surface largely intact in a very fast vehicle, they would have absolutely dominated the race. It was expected to be a race of saving tyres for a Ricciardo in a one pitstop strategy, but the apparent issue with the energy recovery system took precedence for the remainder of the race.
In the end, Ricciardo's winning margin was seven seconds - but only because Vettel lost time after the virtual safety vehicle came out for the last few laps.
Red Bull's other driver Max Verstappen also put on an impressive show after failing to qualify due to work being on his vehicle to fix damage following a practice session crash.
Vettel said: "We had the pace, it was a tricky race". "He got bitten pretty hard today in a session that doesn't really count for anything except setting up the vehicle". After all, the Renault engine is one of the reasons why Daniel Ricciardo isn't considered as a genuine contender. Refreshing! Red Bull know how to celebrate in style.
Ricciardo then offered the huge bottle - but not the shoe - to Prince Albert of Monaco, who took a small sip.
Red Bull Racing driver Daniel Ricciardo celebrates
"Or you could say it's put the team in a stronger position in terms of its value and potential to him".
"I think we had the pace", Vettel said after missing out on a 50th career win. However, calls to demote Verstappen a la Kvyat style seems a bit over the top!
Kimi Raikkonen finished fourth in the second Ferrari ahead of fellow Finn Valtteri Bottas in the second Mercedes and Esteban Ocon, who was sixth for Force India.
While throwing random safety cars into the mix may not be the way forward, Hamilton does have a point that something needs to be done to spice things up in Monaco, but what?
From the list of retirements, the 2018 Monaco Grand Prix saw only one mechanical retirement - Alonso, who suffered from a gearbox failure; reminding us of the days when Honda powered his Mclaren. Carlos Sainz Jr (ESP/Renault) 1:09.013, 11.
In other news, the manufacturer teams have agreed to drop the controversial and rather expensive MGU-H (the same part that troubled Ricciardo in Monaco!) from the sport come 2021.
" He could have been in Apollo 13" said Horner of Ricciardo's intense concentration and problem solving.
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