Bernard Foley’s concussion symptoms have returned after the NSW Waratahs star played in their Super Rugby win over Melbourne on the weekend.

Wallabies five-eighth Foley is in doubt for their round-six clash with the Crusaders in Sydney on Sunday having missed the Waratahs’ opening four games after suffering the head knock in pre-season.

“Bernard’s welfare is our priority right now and our medical team are taking an active treatment process to manage his symptoms,” Waratahs coach Daryl Gibson said.