If any of the Conference Semifinal series remain tied after the second leg on Sunday, the team with most away goals will advance. If the total goals and away goals are equal, then an additional 30 minutes (two 15-minute periods) of added extra time will be played in its entirety. Away goals do not count in extra time. If the score is still tied after extra time, the match will be decided by penalty kicks. For more on the MLS playoff format and history, click here.