The Portland Timbers’ 4-1 win over the Kitsap Pumas on Tuesday night pushed them into the third round of the U.S. Open Cup, setting up a date with the rival Seattle Sounders.

The Sounders are the U.S. Open Cup defending champions and will open that defense on the road in Portland at 7:30 p.m. in PGE Park on June 30. The match will be televised by FSN.

Last year, the Sounders beat Portland, a member of Soccer Division 2, 2-1 prior to beating Kansas City, Houston in a bloodbath at Starfire Sports Complex and then D.C. United in Washington to take the title.

The winner of the Sounders/Portland match will move to the quarterfinals and play the Chivas USA/Austin Atex winner on July 6 or 7.

Update 3:22 p.m: The bracketing has changed. U.S. Soccer has now bracketed the Seattle Sounders FC and Portland Timbers with L.A. Galaxy and AC St. Louis (Division 2).

The Sounders FC-Portland winner advances to the quarterfinal round to meet the L.A. Galaxy-St. Louis winner on either July 6 (St. Louis) or July 7 (L.A. Galaxy).

Seattle would host the quarterfinal round at Starfire.

The match is part of a busy remaining season for the Sounders coming off the World Cup break. Throw in a friendly against Celtic and play in the CONCACAF Champions League in July added to the remaining MLS schedule, and Seattle’s depth will be tested.

It’s a difficult formula for a 4-6-3 team trying to push into the MLS playoffs.