World and joint Olympic high jump champion Gianmarco Tamberi of Italy is in hospital with a suspected kidney stone, just head of Wednesday’s start of his Paris Games competition. Tamberi posted a picture of himself in a hospital bed on Instagram and said: “Unbelievable … this can’t be true. “Yesterday, 2 hours after writing ‘I deserve it’ on social media, I felt a stabbing pain in my side. ER [emergency room], CT scan, ultrasound, blood test …. probable kidney stone. “And now I find myself, three days before the event for which I sacrificed everything, lying in a bed, helpless, with a feve…