Alonso damaged his front wing after making contact with Mark Webber at the first corner and then hit Jenson Button at turn four.
Alonso was forced to make an early stop, which compromised his strategy and left him way down the order.
He recovered only to 11th, meaning that Alonso recorded his first race finish outside of the points for the first time in three years.
“Obviously it was not a clean start,” Alonso told BBC Sport.
“I was a bit unlucky because I think Mark was also having contact with someone and the third part of that equation was me. I had a battle in corner four as well. The race was uphill from that moment as we were last with one stop already done.
“It was damaged in the front because the steering was very heavy in the right corners and very light to the left.”
“I think overall the weekend was not good enough and in Abu Dhabi we have to improve if we want to pass Mercedes in the constructors’ championship.”
Ferrari is four points behind Mercedes in the battle for second with three races remaining.