Tietjens ' side went into the season opener having won 12 of the 15 Sevens World Series titles .
They were knocked out in the quarter - final by England and had to be content with victory in the Plate competition .
Tietjens ' side went into the season opener having won 12 of the 15 Sevens World Series titles but they were knocked out in the quarter - final by England and had to be content with victory in the Plate competition .