Spurs suffered a chastening 5-1 aggregate defeat to Borussia Dortmund after going down 2-1 at White Hart Lane on Thursday night.
But they remain in the hunt for a first league title since 1961, lying five points behind leaders Leicester with eight games remaining.
“We know we are a great team,” said the England midfielder.
“We can’t let this dishearten us. We’ve got to keep the form we’ve had in the Premier League and carry on until the end of the season.
“If we win the league this will be forgotten.
“It’s a bit of a blow for the confidence but it’s important that we keep our heads up in the next game.
“We are second in the league, five points behind Leicester.
“It’s important we don’t think about that too much and don’t get carried away too much with ourselves.
“It’s just about taking each game as it comes and hopefully being up there at the end of the season.”
Meanwhile Bournemouth boss Eddie Howe will take his players to a warm-weather training camp following their match at White Hart Lane tomorrow.
Howe will use the international break to take the squad away for a camp which he believes will galvanise the players for the run-in.
“Tottenham is the only thing that matters, but afterwards we are going to take the lads away for a few days away to Dubai,” he said.
“It is the first opportunity opportunity to do that this season because of our involvement in the FA Cup.
“We are looking forward to it, we did it last year and it was a really good break.
“On the back of that break I think we were unbeaten (through to the end of the season).
“It was a chance to regroup, have some really good intense training session with the lads in a lovely climate, so hopefully it will be the same again.”