Britons Emily Appleton, Oliver Tarvet and Hamish Stewart are each within one victory of securing a first appearance in the Wimbledon main draw.
World number 403 Appleton, 25, came through a 10-point match tie-break against Czech player Barbora Palicova to win 6-2 6-7 (6-8) 7-6 (10-7) and set up a meeting with Slovenia’s Veronika Erjavec in Thursday’s third and final qualifying round.
The 719th-ranked Tarvet, 21, defeated Canada’s Alexis Galarneau 6-3 6-2 to set up a meeting with Belgium’s Alexander Blockx.
Stewart, 25, will face Swiss player Leandro Riedi after the Scottish world number 550 overcame France’s Luca van Assche 7-6 (7-3) 4-6 7-6 (11-9).
But Ryan Peniston, Paul Jubb, Oliver Bonding and Amarni Banks all had their Wimbledon hopes ended in Roehampton on Wednesday.
Peniston lost 3-6 6-4 6-4 to Spain’s Martin Landaluce, while Jubb was defeated by Giulio Zeppieri 6-3 6-2, and Bonding beaten 7-5 6-4 by Argentine Juan Pablo Ficovich.
In the women’s draw, Banks lost out 6-2 6-4 to Poland’s Katarzyna Kawa.
Players must come through three qualifying rounds to reach Wimbledon, the draw for which takes place on Friday at 10:00 BST – before the action begins on Monday.