The 22-year-old established himself in the Premier League during a loan spell with his former manager Redknapp at Queens Park Rangers last season and has started the new season in fine form for club and country.
"I have to thank my manager at Tottenham, Andre Villas-Boas, for giving me the chance this season ahead of a lot of experienced players," he told The Telegraph.
"Last season Harry Redknapp took a chance on me. Many were 'umming and ahhing' but he really gave me the chance to play Premier League football, for which I will be forever grateful."
Spurs travel to Aston Villa in the Premier League this afternoon.