The Scot is struggling with an ankle injury at the moment, but insists it is worth playing through the pain.
"It [the ankle] has been better to be fair, just a bit stiff after matches but it is something I can manage," Robertson told a press conference on Tuesday.
"It is slightly painful but if you don't have any pain doing what we are doing, maybe you are doing something wrong but I feel good.
"I think the physio is sick of treating me. It just takes longer to loosen up in training, maybe an extensive warm-up. It is fine for me in games. You probably get half an hour to warm up instead of 10 minutes."