The Tottenham Hotspur boss has plenty of options to choose from. But, much like last season, he is simply ignoring them.
Last season, there was a sense the Tottenham centre-back had gotten complacent. As the north London side's best and most senior defender, the head coach was never going to drop him. He was also let down by his defensive team-mates, meaning he could blame them for most of Tottenham's shortcomings.
In came Vertonghen's dear friend Toby Alderweireld this summer - and what's happened? Has there been any improvement?
The Belgian should have done far better for Leicester's goal on Saturday and there was a raft of Tottenham supporters calling for him to be dropped after this one. Even if just to send a message, Pochettino needs to stop Vertonghen resting on his laurels and not giving 100 per cent sooner rather than later. Kevin Wimmer and more are just sitting there waiting in the wings...
As with a lot of Pochettino's selections (some that pay off, too) Danny Rose's absence from the Spurs starting line-up so far this season has been completely mystifying.
Rose struggled at times last term but improved considerably, especially going forward. And yet he's been dislodged from the side, with Welshman Davies starting ahead of him. Why, exactly? Rose is needed back as soon as possible.
A lot of Tottenham's problems so far have stemmed from midfield but Eric Dier, a centre-back by trade, has done a much better job than both Mason and Nabil Bentaleb so far this season. Dele Alli, meanwhile, impressed throughout pre-season and, as usual, Pochettino has been too afraid to start him - just like he was with Harry Kane last campaign.
Granted, Alli's 19 years of age suggest caution is most certainly needed. But he should start over Mason 100 per cent when Tottenham take on Everton. The fact he scored after coming on suggests nothing fazes him right now - it's a great time to tap into that.
There are plenty more candidates for the drop, meanwhile, with Erik Lamela a given it isn't even worth mentioning.