Cristiano Ronaldo has visited a clinic while on holiday in Ibiza for hyperbaric oxygen therapy to speed recovery from his current knee injury, according to a report in Marca.

Ronaldo picked up the injury from a Dimitri Payet challenge in the Euro 2016 final.

Ronaldo has reportedly twice visited the Clinica Evidental -- a dental clinic which according to Marca also provides the hyperbaric oxygen therapy treatment as an additional service.

Ronaldo has suffered from a series of knee problems in the past, with a tendonitis problem during the 2013-14 club campaign and 2014 World Cup putting his career at risk, although more recently that issue appeared to have eased.