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Diego Valeri celebrates after scoring a goal during the Portland Timbers' 2-1 win over Toronto FC at Providence Park on Sunday, May 1. Pete Christopher/Staff

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Portland Timbers midfielders Diego Valeri and Jack Jewsbury missed training Tuesday with injuries and are unlikely to be available for Wednesday's CONCACAF Champions League game against Deportivo Saprissa.

Valeri has been dealing with a hamstring injury, while Jewsbury has been dealing with a hip flexor issue.

Timbers coach Caleb Porter said the club would have to reevaluate both players on Wednesday and make a final decision as to whether either player could feature in the CONCACAF Champions League game. The Timbers must beat Deportivo Saprissa Wednesday to advance to the knockout round of CONCACAF Champions League.

"It will be difficult if they couldn't train today for them to play in a game tomorrow," Porter said. "So, if something changes tomorrow, then obviously they'll be in the lineup because we always planned in this game to play the very best lineup we can."

Valeri and Jewsbury are not the only players that could be unavailable for Wednesday's game

Timbers forward Fanendo Adi is suspended for yellow card accumulation and will be unavailable to play in the match. Timbers midfielder Ben Zemanski is dealing with a collapsed lung and will be unavailable for the game as well. Timbers winger Darren Mattocks is continuing to deal with a hamstring injury and will only be available off the bench Wednesday, Porter said.

The Timbers will then be dealing with other absences heading into their final MLS regular season game of the year on the road against the Vancouver Whitecaps Sunday.

Timbers midfielder Diego Chara and defender Liam Ridgewell will be suspended for the Vancouver game due to yellow card accumulation, while Zemanski is likely to be unavailable for Sunday as well.

Porter also said that if Jewsbury and Valeri aren't healthy enough to play Wednesday, the club will need to evaluate the midfielders again later in the week to see if they can play Sunday.

The Timbers (12-13-8, 44 points) would clinch an MLS playoff berth with a win at Vancouver. They could only clinch an MLS playoff berth with a tie or a loss Sunday if other teams faltered.

"We don't know if Valeri or Jack Jewsbury are going to be available for either game," Porter said. "Ben Zemanski is the same."

-- Jamie Goldberg | jgoldberg@oregonian.com

503-853-3761 | @jamiebgoldberg