In final practice, and again during the grand prix itself 11 days ago, Massa lost control of his Ferrari towards the end of the start-finish straight on the streets of the principality.
On both occasions Massa hit a metal barrier to his left before sliding straight on for 100 metres and ploughing into a TecPro barrier at first-corner Ste Devote.
Driver error was accountable for the first accident, but following a detailed inspection of Massa's car, Ferrari discovered a suspension failure was at fault for the second.
Massa required trackside assistance, with his neck put in a brace, prior to undergoing precautionary checks at the Princesse Grace hospital.
Ahead of this weekend's Canadian Grand Prix around Montreal's Circuit Gilles Villeneuve, the 32-year-old Brazilian insists there are no lingering side-effects.
Asked whether the accidents had dented his confidence, Massa replied: "No, for sure not."
He added: "On the television the accidents looked very similar, but they were completely different.
"The first one I just locked the wheels and went straight, and for the second I had a problem with the suspension.
"Overall I'm fine. I just felt a bit of pain in my neck after because the crashes took place in the same place and in the same direction.
"But it was just muscles. I'm fine, everything is fine."
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