Eric Dier says this season is "only the beginning" after Tottenham Hotspur's title dream ended at Stamford Bridge on Monday.
Leicester were confirmed as Premier League champions after Spurs' squandered at two-goal lead to draw 2-2 at Chelsea, leaving the Foxes seven points clear at the top with two matches to play.
The point meant Spurs secured a top-three finish in the Premier League for the first time and, given their vastly superior goal difference, they can wrap up second place with one win from their final two matches against Southampton and Newcastle.
Dier, who has missed just one league match this term, said it is "100 percent certain" that Spurs, who have the youngest squad in the Premier League, will improve next season.
"It's been a great season and we're not going to stop here," the 22-year-old told Sky Sports at Stamford Bridge. "We're building for the future, not just for this season. We've got two more games. It's only the beginning of our journey.
"I'm sure next season we'll get even better and we'll be even stronger. That's 100 percent certain. I'm looking forward to the next two games and next season."
Harry Kane and Son Heung-min gave the visitors a comfortable lead at half-time but goals from Gary Cahill and Eden Hazard maintained Spurs' miserable record of having not won at Chelsea since 1990.
"We're very disappointed," he added. "We came here with a clear objective to win the game and finish with this record that we don't like here. To be 2-0 up and to let them get back into the game at 2-2 makes it worse, then obviously Leicester being champions.
"We played very well in the first half and at the beginning of the second half we were doing the same things. We should be very proud of the way we came here and played. Everyone has been very brave for 90 minutes but we've conceded from a set piece which made things nervy for us, which was disappointing.
"From then onwards, their crowd got behind them and they went after the second goal and got it, so we're disappointed with that."
Spurs were lucky to finish the match with 11 men after Mousa Dembele appeared to eye-gouge Diego Costa and Erik Lamela stood on Cesc Fabregas' hand.
The two incidents were missed by referee Mark Clattenburg and they could face retrospective action from the Football Association.
Dier himself was fortunate to escape a sending off after a reckless lunge on Fabregas while he was already on a booking and Spurs finished the match with a Premier League record nine yellow cards.
The England international hinted that Tottenham were fired up by comments from Hazard and Fabregas about wanting to stop Spurs winning the league and hoping Leicester would be champions.
"Our objective was to come here and stand up to them," Dier said. "We haven't appreciated some of the stuff that's been said this week and we came here and stood up to them. We can be proud. We're a young team.
"I think at the end it did get a bit too much and obviously I'm disappointed with that and we'll learn from that. Next time we'll focus on the football and get the win instead.
On Leicester, the former Sporting Lisbon player said: "I believe whoever's champions is worthy champions -- there's no hiding that. Credit to them, they've had a fantastic season and it's a fairytale story."