The Brazil midfielder signed from Paris Saint-Germain for £25m in January and went on to play 11 times for the club last season, having made his Spurs debut as a late substitute in the 2-2 draw at Juventus in the Champions League.
Moura is now keen to play his part in the club's push for silverware in 2018-19 after admitting that fully adapting to life in the Premier League took him a while.
"The first six months was for the adaptation, to know the club and my teammates and to adapt to a new championship," the 25-year-old told Sky Sports News. "I hope this season I will be 100% ready to help the team.
"I feel comfortable now but I am a little bit reserved, a little bit shy, but all my teammates are very nice and I am so happy, everyone helps me. It is a pleasure to be here and I am so proud of this."