Frank Lampard has told BBC Sport that Tottenham Hotspur need to win trophies, if they are to keep their current squad together at White Hart Lane.
Tottenham have made huge progress over the last two seasons, where they have become genuine title contenders in the Premier League.
Spurs pushed Leicester City all the way last term, but fell just short.
And, this time around, they have managed to move to within four points of league leaders Chelsea - with just six matches remaining this season.
Tottenham are also set to take on Chelsea in the FA Cup semi-final this weekend.
And Lampard believes that the next step for Spurs is to start winning silverware, otherwise they could risk losing some of their key stars.
"Tottenham went close to winning the title last year but there are only so many times you can go close. Now is their time as a team where they have to make that breakthrough," Lampard said.
"The improvement of individuals in this Spurs team has been huge in the past couple of years, but winning something is the next step they have to take.
"They have to, if they want to keep the likes of Kane and Alli on a long-term basis."
Tottenham last won a trophy back in 2008, when they beat Chelsea in the League Cup final.
If Spurs are to beat Antonio Conte’s side in the semi-final of the FA Cup at Wembley, they will face the winner of Manchester City's match against Arsenal.