Kasper Dolberg was reportedly the victim of a robbery while the Denmark striker was away on international duty.
Dolberg, who plays for Nice, had his Porsche stolen from the city's airport car park, according to reports from France.
He also discovered around €2,000 (£1,850) and several phones had been taken from his home, as reported by L’Équipe via Get Football News France.
The report says Dolberg left his Porsche in Nice Côte d’Azur airport's long stay car park when he left France to join up with the Denmark squad for Nations League matches against Belgium and England.
On his return to Nice on Thursday evening, the 22-year-old goalkeeper reported the disappearance of the car as well as money and phones from his home.
The perpetrators had apparently gained entry to the property using an access pass which had been in Dolberg's Porsche.
Police are now investigating the matter, which is the second time Dolberg has had valuables stolen since he joined Nice from Ajax just over a year ago.
In September last year, Dolberg's watch was stolen from the French club's dressing room by teammate Lamine Diaby-Fadiga, who was later sacked by Nice.
Diaby-Fadiga confessed to stealing the £62,000 watch, saying he had done so out of "jealousy", and posted a lengthy apology on Twitter.
The then 18-year-old posted: "I was unfortunately injured for several months and my return to competitive action was further delayed following a red card I picked up whilst playing for the U19s.
"That affected me mentally and my difficult situation contrasted starkly the success and aura of Kasper, my team-mate. I took it out on him without having any reason to do so, maybe a bit because of jealousy.
"Instead of trying to battle on the pitch to provide him with competition for places, I reacted stupidly towards him.
"My actions were not taken out of an appetite to gain something from it, but out of disappointment, frustration and feeling discredited."
Diaby-Fadiga now plays for Paris FC.
Dolberg and his Denmark teammates lost 2-0 to Belgium last Saturday before drawing 0-0 with England three days later.
