Losing Watene-Zelezniak would be a further blow for the Warriors, who also saw centre Rocco Berry leave the field injured in the defeat.
The Warriors’ official site lists Berry’s condition as a shoulder injury, and the 23-year-old was seen with his arm in a sling towards the end of the game.
Fellow centre Adam Pompey also failed to complete the 80 minutes, and left the field late with what’s been listed as a leg issue.
If either Berry or Pompey fail to prove their fitness before next weekend, Roger Tuivasa-Sheck looms as the first-choice replacement as he returns from a hamstring injury suffered before the Warriors’ defeat to the Sydney Roosters earlier this year.