Mateo has spent the past fortnight on standby to replace Fuifui Moimoi, who bravely started the past two matches with a medial ligament tear in his right knee. While Moimoi is considered a definite starter on Friday night, an Eels insider said Mateo would likely start on the bench in place of rookie forward Jeremy Latimore.
"There have been a few concerns over Feleti's match fitness because he hasn't played any football for so long," the insider said.
"But Feleti did an endurance test this week and ticked all the boxes, so he's ready to go.
"There's a good chance he'll be back this week on the bench. It's a massive game and he's one of our top players.
"But it's a big call to change a winning side."
Mateo will be told tomorrow whether he is playing before a 30,000-plus crowd at the SFS Park or a handful of punters at a suburban oval.