"I think it was my best game for England," Defoe said.
"Our performance was good and I think that's what the manager was looking for.
"In the first half I thought we were a bit unlucky with the goals we conceded - it's pre-season for a lot of the lads, but the second half was a lot better, we showed good spirit and we deserved the result."
Defoe insists there was still confidence in the dressing room.
"The manager just said 'keep it going'," Defoe said. "Last season the spirit was fantastic and he wanted to keep that going. He basically just lifted us. He brought new lads on and the fresh legs worked.
"It's always nice to get on and play for your country."