It is also uncertain when the Scot will be back on court.
The Wimbledon star often wore his hair long and curly - but lately has favoured shorter styles
Danielle Collins, in her final year on the WTA Tour before retirement, booked her first ever 1000 series final in Miami on Thursday with a dominant 6-3, 6-2 victory over Ekaterina Alexandrova.So far this year Rybakina has won titles in Brisbane, Abu Dhabi and her first WTA 1000 final of the year in Doha.