Tottenham spent £34 million on two attacking players last summer, but are yet to see the best out of them.
Tottenham have outperformed expectations this season, coming agonisingly close to winning the title, and if Leicester City suffer a late collapse then they could still do so.
Key to their success has been the trio of new additions Toby Alderweireld, Kevin Wimmer, and Dele Alli, who joined the squad last summer after signing last January and being loaned back to MK Dons.
Their most expensive summer additions were Heung-Min Son and Clinton N'Jie, and despite a promising start from the South Korean, the duo have not really played a major role in their title challenge.
N'Jie had a slow start before suffering a knee injury and being out of action between December and early April, while Son has simply faded and spent most of his time in recent weeks on the bench, failing to grasp his chance when handed it.
Unfortunately for a combined £34 million spend on two players, the return has not been enough.
Had either made a more significant impact then they could have made all the difference in the title race.
The issue Tottenham have this summer is deciding whether it was their scouting which failed them, or if simply they put their poor displays and time to settle down to bad luck.
It could be that as a result they look towards the English market, where players can be more costly, but adapt quicker.
Spurs must also consider that adding further signings this summer will make it harder for Njie and Son to break into the team, but they should also be ruthless, and send a message that the duo must rise to the challenge if they are to establish themselves at the club.