Defoe received a pass from Bradley Orr before advancing to the edge of the area and then unleashing an unstoppable shot into the top right corner.
The goal came in the wake of Defoe's non-selection for the England national team and Nelsen was happy to see the talented marksman respond in a positive manner.
"That's exactly how I thought he would react," Nelsen said. "A brilliant goal, wasn't it?
"That's Jermain Defoe. And that's why England will miss him dearly, I think, come World Cup time."
"Jermain Defoe has been doing this since he was 14 years old and as long as he plays he will do that," added the Frenchman.
For breaking stories and all the great banter like us on Facebook: facebook.com/tribalfootball