The double-time World Champion was unable to post a lap time during Q2 and he was soon spotted leaving the garage completely as yet more reliability issues struck the McLaren team.
“We broke the power unit,” Alonso said to Sky Sports F1.
“My lap was good; until the last corner I was like half a second better than in Q1, but then I went on the throttle and it [the engine] blew up, so unfortunately that’s the situation.
“We had the possibility to be a couple of places better than what we are.
“For tomorrow we’ll fit a new power unit with not the perfect settings; there is no warm-up, there are no laps that we can set the engine, so we’ll probably have a difficult race.”
The Spaniard has now preparing to adapt second power unit of the season, with each driver permitted only four engine changes before penalties start to come into effect.