Real Salt Lake defeated the Seattle Sounders 6-5 on penalty kicks after a scoreless draw in Round One of the Audi MLS Cup Playoffs at Lumen Field on Tuesday night.

Neither team could find a first-half breakthrough and went to the locker room scoreless. The Sounders had seven shots to RSL’s zero, but Seattle couldn’t get a shot on goal.

The Sounders came closest in the 15th minute when Nicolas Benezet got free in the six-yard box and dropped a pass for Jordan Morris, whose shot was blocked. Brad Smith and Cristian Roldan then each had subsequent shots blocked as well.

The Sounders nearly took the lead in the 50th minute when they had a 4-on-3 counterattack but Morris’ shot was over the crossbar.