Here is a quote on the internet from 2011
about Nadal's Dr Cotorro,
changed his description from
"licensed physiscian for completion of doping control"
to "a specialist in sports medicine"
They all have sports specialists.
Tennis Tonic
"Alcaraz helped by Nadal's doctor before facing Ruud in
US Open final"
Ruud after the final,
"I think he also has help from I believe a doctor who also has helped
Rafa for many years"
Wonder why Ruud mentioned the doctor specifically,
maybe
Spain has the best specialists for completion of doping control.