Starting from fifth on the grid, Alonso dropped to sixth on the first lap after suffering from an issue with his car’s ERS.
“We had an electric problem on the ERS side and we didn’t have the horsepower at the start and along the first straight,” said Alonso.
“Luckily here, there’s not a lot of places to overtake, so I was able to keep positions.”
After Sebastian Vettel retired in the early stages due to a gearbox problem, Alonso spent the majority of the race behind Daniel Ricciardo but was unable to pressure the Red Bull for the final podium position in the later stages.
“The race seemed very tough for us,” said Alonso. “We had some luck and overtook some guys so I think fourth was the maximum we could do today.
“The first three were very, very fast and showed their potential straight away, while Ricciardo showed his potential at the end. There was no threat from behind so, to be honest, it was a little bit less fun than expected as I was racing alone all race.”