The Tottenham Hotspur defender has been letting the side down with his performances of late - even though he isn't the only one.
As most Spurs fans will no doubt agree, conceding six goals in two games just isn't good enough. It wouldn't even be good enough for Saturday's opponents Leicester - at the bottom of the Premier League - and shouldn't be for a club like Tottenham.
The problem for the north London side, though, is that their most senior defender - and usual rock at the back - has joined in with the under-performing crowd of late.
Indeed, Jan Vertonghen was poor against Manchester United and once again v Leicester on Saturday afternoon. The Belgian is supposed to be Tottenham's leader in defence, the man who tells his 21-year-old centre-back partner and his full-backs exactly what to do.
But Vertonghen has faltered of late - and was literally brushed off by Leicester's David Nugent at the weekend. Could it, then, be time for boss Mauricio Pochettino to drop him?
It's unclear whether Vertonghen is simply burnt out or is lacking in confidence. Some Tottenham fans have pointed out that playing with an inadequate back line drags the Belgian's performances down as his head drops when he sees what he has to deal with.
Vertonghen, however, is supposed to be their leader. And dropping him could send an important message, inadvertently helping to improve others.
Sometimes you have to reach out to someone actually capable of improving. Otherwise, Pochettino might be waiting an awfully long time for Walker to come good and Dier to suddenly gain years' worth of experience...