V-Varen Nagasaki upset FC Tokyo 1-0 with an adventurous display of attacking soccer Friday night, thwarting the second-place side's hopes of closing the gap on J. League leaders Sanfrecce Hiroshima.

The loss was just the first in 10 matches for FC Tokyo, which was forced onto the back foot by a visiting side that came into the clash 13 places beneath them.

Nagasaki executed an aggressive game plan from the outset and was a deserving victor after Juan Manuel Delgado slammed home the winner with 13 minutes left at Ajinomoto Stadium.