Sydney Swans utility Lewis Roberts-Thomson will undergo arthroscopic surgery today after damaging his knee in last Friday night’s 21-point loss to Geelong.

Swans physiotherapist Matt Cameron said today’s procedure will provide the club with further information regarding how long the 29-year-old will remain on the sidelines.

“Lewis unfortunately twisted his knee in that second quarter,” Cameron told SwansTV.

“The scans on the weekend showed that he’s got a tear to one of the cartilages inside his knee, so they are going to need to go in and have an arthroscope, which he’s having today, just to determine what needs to be done to solve that problem.

“He’s having that today and we’ll know more after the op about exactly the length of time we’re looking at.”

Roberts-Thomson was not the only absentee on the Swans flight to Wellington yesterday, with senior defender Rhyce Shaw also unable to make the trip to New Zealand.

Cameron said the defender had taken longer than expected to recover from a lower abdominal tear suffered in the Swans round two win over the Gold Coast Suns.

“Rhyce took a little bit longer than we thought to settle down in order to start running, but he is running now,” he said.

“He wasn’t running well enough for him to make the flight yesterday, but he will be running this week and training going into the next game.”

In other injury news, young Swans defender Dan Hannebery has been given the all clear to train in Wellington this week after suffering a knock to the calf on Friday night.

Cameron said the 22-year-old has continued to improve and should be available for selection for Thursday’s Anzac Day clash.

“He was bashed up a bit (on Friday night),” he said.

“He did have a knock to the calf and he was sort of limping a bit in the end, but that’s improved certainly in the last 24 hours since we got over here.

“He’s looking really good today and he should be right to play.”