Coles is facing a battle to be match-fit for the British and Irish Lions tour of New Zealand after it was revealed he's suffering from concussion symptoms.
Coles hasn't played for the Hurricanes since mid-March when he limped off against the Highlanders with a knee injury.
He then suffered a calf injury at training but Hurricanes coach Chris Boyd says he also began experiencing headaches when exercising. It's not known how he gained concussion nor how long he will be off the field.
