After Chelsea won the Champions League in dramatic fashion in Munich on Saturday night, it meant fourth-placed Spurs will now head into the Europa League instead.
It is scant reward for a campaign which for so long had promised so much.
"The main aim of the season was to finish in the top four, and we have done that. What happened with Chelsea was out of our hands and was just unfortunate," said Defoe, who is in his second spell at Spurs having been signed by Redknapp at Portsmouth in January 2008.
"There have been lots of ups and downs, but we all stuck together and still performed."