Wallaby playmaker Berrick Barnes is in line to return to his fomer position at first five-eighth as the Waratahs look to kick start their 2012 Super Rugby season.
Barnes has not played at 10 for the Waratahs since he started suffering from migraine almost 12 months ago and has been playing at 12 since.
During an extended training seassion held on Monday Barnes moved closer to the scrum and occupied the second-receiver's position.
The move could see Waratahs' captain Daniel Halangahu dropped to the bench or change places with Barnes for the match against the Sharks.
Barnes took over the playmaker's role last year for the Wallabies when Quade Cooper was injured and has played in the position extensively.
After a stuttering season in which they have only won one match the move to 10 could provide the spark Waratahs coach Micheal Foley needs.
"The great thing about Berrick is he's got that versatility. He can play 10, 12 and 15."
"He's definitely being considered for 10," Foley told AAP.
Halangahu has captained the Waratahs in all four of their matches so far so if he is dropped Barnes is likely to be named as captain.
"I think Daniel's done a very good job in that area," Foley said.
"The first three games of the season have been particularly tough games and Daniel's brought the group together particularly well.
"If Daniel's in the side, there would be no reason why he wouldn't continue."
"And if he's not selected in the side, then we would be looking at a different skipper."
The Waratahs have had a torrid start to the season and are facing the prospect of losing four of their opening five games for the first time in 17 years of Super Rugby history.
Coach Foley refuses to believe that a loss to the Sharks this weekend could end their chances of reaching the play offs.
"There's a number of games left in the season. I think anyone who thinks that way would be walking out the door now," he said.