An up-and-coming teenage tennis ace shocked and horrified spectators when he collapsed on the court from a sudden heart attack last Wednesday.

Player Luigi Santarelli, 15, was seen laughing with his coach just minutes before he suddenly dropped to the ground, witnesses told GBNews.

The medical staff at the Cittadella dello Sport complex in San Giovanni Teatino, Italy, immediately jumped into action to tend to the fallen player, and he was swiftly carted off to a local hospital for emergency treatment.

Sadly, it was all to no avail as Santarelli was pronounced dead at Pescara hospital. He reportedly never regained consciousness.

Authorities have…

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