I disagree on Martin too, and it seems he is a better CB than a RB, in so much that we rely on pacy, attacking fullbacks, and he isn't.
That was the best display from Tettey in a long time, against Huddersfield his only answer seemed to be to foul runners, on Saturday he played the role perfectly, anticipating runners from midfield, and covering back when the fullbacks pushed on.
We massively benefited from facing a team that came to play football combined with, basically, no one having a bad game, closest thing was that Murphy had one of his quieter ones.
Maybe the players were a bit conscious of Webber sat in the stands too, who incidentally has a full set of coaching badges under his belt, so I assume he knows his stuff when he is watching a game / individual players.