There are some players who simply need to raise their game next season.
As the old saying goes, time waits for no man, and there's three men at Tottenham who really must step it up next season if they want to avoid being left behind.
Manager Mauricio Pochettino, who signed a five-year extension on Thursday, is building something special in North London, and there are a few who must impress the Argentine next term in order to remain part of perhaps English football's most exciting project.
The 23-year-old South Korean forward, a £22 million signing from Bayer Leverkusen, hasn't exactly blown anybody away this season, with four goals and one assist from 27 Premier League appearances looking rather meagre when you consider his price-tag.
It is, in truth, unfair to judge foreign imports on their first season in English football, especially given how so many step it up second time around, but if we're not using the term 'leaps and bounds' to describe Son next season then Spurs may cut their losses - and few would blame them.
Like Son, the Cameroon winger arrived at Tottenham for big money last summer, joining the Lilywhites in a £15 million deal from Lyon. Unlike Son, the 22-year-old has not had an abundance of opportunities to impress, a lack of form and fitness resulting in just eight league appearance - all of which came from the bench.
Even before his injury in December, which saw him miss the guts of five months, N'Jie was not setting the world alight, earning 15-minute cameos in Premier League outings here and there, but nothing particularly inspiring.
Perhaps controversial, given how much he has improved under Pochettino since his big-money switch from Roma in 2013, but Lamela's refinement looks a lot greater only because of how poor he looked early on in his Tottenham career. Is six goals in 66 Premier League appearances under Pochettino - 52 of which were starts - enough for an attacking player?
Of course, he excels in other areas, with Pochettino helping him develop some steel to match the silk, but attacking quantities always have and always will be judged on their productivity, and that's one of the question marks hanging over Lamela.
Fans have taken a real shining to him this season, but would the affection for him be as great had he set this standard from day one, back in 2013?
He is a good player, not a great one, but another season like his previous two and Pochettino must question whether he's holding the team back.