Despite initially going ahead in the early stages through Lewis Holtby, Spurs struggled with Sounders' agile frontline and had to rely on two second-half penalties to avoid defeat.
The two sides played out a vibrant, entertaining encounter at CenturyLink Field in Seattle, with both sides playing attractive football in front of a packed crowd of over 55,000 fans.
Nevertheless, Spurs took the lead with only 10 minutes on the clock as Holtby nodded in Harry Kane's left-wing cross from 10 yards.
With 54 minutes on the clock, Roberto Soldado was sent tumbling in the area by Marshall after a neat touch had taken him clear, and the much-maligned Spaniard converted the spot-kick.
Substitute Tristan Bowen's tap-in looked to have claimed a late victory for Sounders, but Falque confidently dispatched the game's third spot-kick following DeAndre Yedlin's handball and the match ended level.
