Here, we've taken a look at six potential options Pools could consider to replace the suspended John on the left side of their defence.
1. Jay Benn
Filled in at left-back following John's dismissal against Woking but won't have been best pleased with his involvement in the home side's fourth goal and has struggled for form in recent weeks. Photo: Frank Reid
2. Tom Parkes
The skipper has been generally excellent under Nicky Featherstone and Pools missed his leadership qualities at the weekend. The 33-year-old is just about his side's only naturally left-sided option although he is most comfortable operating either as one of two conventional centre-halves or in the centre of a back three, where his lack of pace is less likely to be exposed. Photo: Frank Reid
3. Nathan Sheron
The 28-year-old is one of the most versatile members of the Pools squad and has filled in at both right-back and centre-half during his time in the North East. No doubt he could probably do a job on the left side, although Pools would surely miss his industry and energy in the engine room. Photo: Frank Reid
4. Louis Stephenson
The 20-year-old has made an impact following a spell out of the side before and impressed having been brought back in from the cold by Anthony Limbrick last season. Even so, the young defender has hardly featured for Pools this term and Featherstone suggested the club were looking to send him out on loan last week. John's suspension might have changed their plans, however, and Stephenson is a player the home crowd tend to get right behind at Victoria Park. Naturally right-sided but has lined up on the left before and played there a lot in pre-season. Photo: Frank Reid