Bentley was meant to spend last season on loan at Premier League new boys West Ham, but an injury scuppered his chances as he returned to Spurs after playing only five games for the Hammers.
But the winger says he is looking forward to his challenging task in Russia, and is fit and ready to start playing.
"I'm excited by the challenge. I'm there until Christmas and I'm looking forward to the challenge ahead," Bentley told Sky Sports News.
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"You always hope, but there's been a lot of water under the bridge at Tottenham with me. The injury last year - I was out for a season - and there are a lot of good players there ahead of me."
When asked about gaining a place in Spurs manager Andre Villas Boas' side on his return, he said: "You always live with that hope [in] pre-season, but it wasn't to be and I'm looking to play some games and see where we go from there."Bentley hasn't ruled out the possibility of staying at Rostov further than the proposed short loan but for now he is fully concentated on playing once again.
He added: "I'm fit and ready to go. I just want to get back playing football and get that buzz from playing again.
"I'm as fit as I can be as far as not playing, but that's what I'm looking to do - get match fit while I'm over there and get in the full flow of playing again.
"You never know in football. We're treating it as obviously contracted for a short term. But long term we'll see what happens.
"I'm going there to hopefully enjoy my football. If things work out then we'll see what happens from there."Spurs manager Andre Villas Boas is confident that Bentley has made the right decision in joining Rostov.
"He's very professional and does things right, but the results haven't gone so well. The future is bright with such talent that's at the football club. They've got everything in place."