Johnston has been a model of consistency for the young Reds in 2018-19 and boss Critchley feels the 20-year-old's performances have gone up a notch since he handed him the armband.
The young Reds go into the Premier League 2 clash with table-topping Everton on the back of a 13-game unbeaten run, and having beaten the Blues in the reverse game at Goodison Park earlier in the season.
Kick-off at Anfield tonight is at 7pm GMT and you can watch the game live on LFCTV and LFCTV GO. If you'd like to attend the match on the Kop, tickets must be purchased in advance before the ticket office closes at 5pm.