The Spurs captain has missed his side's last two games. Is he going to miss a third on Sunday?
The story of Younes Kaboul's season so far makes for interesting reading. The struggling defender was made Tottenham Hotspur's captain earlier this term, when the likes of Jan Vertonghen or Hugo Lloris seemed much more suitable candidates.
Kaboul then produced a superb display against Arsenal in the north London derby.
Apart from that, however, the Frenchman has delivered nothing of value for the north London side - and has largely put in poor performance after poor performance.
The 28-year-old was said to have missed his side's clash with Hull City last weekend for personal reasons, while being left out of a Thursday night match often means you are being primed for a Sunday fixture.
And that may well be the case, with this week's omissions proving insignificant and the Spurs captain being reinstated to the line-up against Everton at the weekend. But what makes the situation intriguing is that the majority of Tottenham fans would surely prefer it if he wasn't.
The Spurs defence hasn't looked world beating over the past two games - but nor have they looked like an accident waiting to happen. With Kaboul, an error is always just around the corner.
Sunday will be the true measure of Pochettino's management of his defence. If the Frenchman starts once more, fans in north London will know Kaboul is still a part of his plans. A third game missed in a row, however, and Pochettino will be sending the clear message to the centre-back that he simply hasn't been good enough this season.