Massa, Magnussen hit by tire failures in first China practice (VIDEO)

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Felipe Massa and Kevin Magnussen were both sidelined by tire failures during first practice for the Chinese Grand Prix on Friday morning.

Three separate incidents in the 90 minute session have prompted fresh tire concerns heading into the rest of the weekend in Shanghai, but initial feedback suggests that the problems are not related to Formula 1 tire supplier Pirelli.

Massa was the first driver to suffer an issue, with the tire on the left-rear of his car coming loose from the rim early in FP1 to send him into a spin.

Massa limped back to the pits, but the session was red flagged due to the amount of debris left on the track.

The session soon resumed and Massa was sent back out once repairs had been completed on his Williams car, only to suffer a puncture on his left-rear tire once again.

Minutes later, Renault’s Kevin Magnussen saw his left-rear tire fail and cause significant damage to the rear-end of his car, again leaving debris on the track.

The session was halted for over 20 minutes while the track was cleaned and investigations were conducted before eventually resuming with eight minutes remaining.

Pirelli confirmed that investigations into the failures are now ongoing.

During the session, McLaren reported over the radio to Jenson Button that it believed Massa’s failures to be related to the wheel rim on his Williams and not the result of Pirelli’s tires. The engineer also said that Magnussen’s was caused by debris left by Massa on the track.