It was on Sunday that Marc Marquez was involved in a high-profile crash during the warm-up for Indonesia's Grand Pix.
The 29-year-old was treated in hospital after the accident and has now been diagnosed with double vision - something he has suffered from before.
“During the trip home to Spain, I began to experience vision difficulties.
I was examined by my doctor Dr.
Sanchez Dalmau who confirmed that I have suffered from double vision again.
Fortunately, the damage is not as serious as the one I had last year.
Now it's time for me to rest and see how the injury develops ", he writes on Instagram.
See the crash in the player above.