Defoe joined TFC in January from Tottenham.
"They're watching," Defoe said, referring to the England managerial staff.
"I spoke to the physio this morning, he called me up and said, 'How are you feeling, is everything 100 percent?' I said, 'Yeah.' And he said, 'Good, because [head coach] Roy Hodgson wants the physios to phone all the players that potentially could be in the 23-man squad. He's got a list of 30.'"
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