Debutant goalkeeper Sargeant helped his side keep a clean sheet while Tom Derry’s 62nd minute header kept the Surrey side’s play-off hopes alive.
Striker Ruel Sotiriou was also involved for Leatherhead, and enjoyed the full 90 minutes in the home win over Dorking Wanderers.
Youngster Andrew Camilo-Tayaca was involved in Northwood’s 0-2 defeat at AFC Dunstable on Saturday afternoon.
Toby Stevenson was on the bench for Heybridge Swits as they recorded a midweek win over Witham Town, before Saturday’s win over Cheshunt boosted the Swifts play-off hopes.
Goalkeeper Arthur Janata was a substitute for Harlow Town as the Essex side fell to a 2-0 defeat at Merstham on the weekend.