Redknapp rates Johnson as future Portsmouth captain
"Glen was in and out of the team at Chelsea. If he made a mistake he was out. But unless he has a disaster he will be playing every week for me. He's matured and he is a good lad.
"His concentration has improved and perhaps, most of all, his confidence has. Maybe he felt if he made a mistake at Chelsea he was out, but he plays here. I'm a big believer of him."