Tottenham striker Defoe understands Portsmouth fans' frustrations
He said: "I can totally understand (they are upset), if I was a fan I'd be the same.
"But it is part and parcel of being a footballer - players come and go.
"What people have got to realise is that sometimes in life an opportunity comes up and you think about the situation.
"You hope it is the right decision. It happens. I'm not the first and I certainly won't be the last."