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Finkler missed Victory's 2-2 draw with Central Coast Mariners with a groin problem, having also been forced out of the side's trip to Newcastle Jets in Round 4, but Victory head coach Ange Postecoglou will give his Brazilian playmaker until Friday to prove his fitness.

Both Finkler and fellow midfielder Mark Milligan were absent from Victory's training session on Tuesday.

Milligan is expected to be fine for the trip to Parramatta Stadium but Finkler's injury remains a concern for Postecoglou and his coaching staff, especially with Marcos Flores suspended for the match against the Wanderers.

Postecoglou may be tempted to risk Finkler against Western Sydney despite the 27-year-old midfielder not being fully fit to ensure Victory keep at least one of their main creative players on the pitch but either way left-back Adama Traore believes the team will find a way.

"I think we've got 22 players ready to play and it's up to the coach to fill the gap, you know," Traore said on Tuesday. "We are all on the same page.

"I think the one they're going to put there, is hopefully going to do the job."

Isaka Cernak took over Finkler's role against the Mariners but Melbourne struggled to break the visitors down in the second half despite having an extra player for almost 40 minutes and Postecoglou would undoubtedly be wary of going into a game without both the Brazilian and Flores.

After Saturday night's draw, Victory winger Marco Rojas admitted his team needs to eliminate lapses in concentration, which are costing them defensively.

Victory have the second-worst defensive record in the A-League behind bottom club Sydney FC but Traore has reminded his teammates defensive concentration is required from the entire team.

"Defensively, not only the four defenders, it's all 11 players where I think we need more concentration," Traore said.

"It's not about one or two players, it's everyone who has to always focus for 90 minutes not 10 minutes and then switch off."

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