Andy Murray had an important update to share with fans on Friday in a rare personal message on Instagram.The tennis champion revealed that he has had his first COVID-19 vaccination as he praised key workers and scientists in a heartfelt post.READ: Andy Murray’s £1.8million wedding purchase will blow your mindSharing a photo of him in his car pointing to a plaster on his jabbed arm and proudly holding up his vaccination card, Andy penned: "That first jab feeling!WATCH: Andy Murray and his wife