"As soon at it was noticed, FP3 was obviously suspended and it didn’t continue. A repair was undertaken to that area.
"Further checks were undertaken for a number of other drains at exactly the same point in time, just to see."
Masi, who also offered his condolences to FIA steward Vitaly Petrov after the sudden passing of his father, continued to explain new concrete was inserted underneath the drain cover to ensure future safety.
While an F1 car produces an incredible amount of force which severely stress tests any surface, Masi confirmed a number of safety precautions had been undertaken ahead of this weekend's running.
"It's one of those, we don’t realise or probably appreciate the forces an F1 car generates," added Masi. "It was one of those that was certainly unforeseen, is probably the right way of putting it.
"Considering the circuit’s had a significant number of upgrades before this event, including the entire resurfacing of the circuit as well as a number of safety barrier upgrades, all of the drains were also checked at the same point in time."
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