After fighting back from two games down last time out against St Neots, Devonports Haverhill completed the same feat away at Peterborough.
First up for the Devonports was Geoff Wilson, who faced a solid opponent at five and went down in three 15-8, 15-6, 15-11.
Gary Last also faced an experienced squash team player and also missed out 15-8, 15-6, 15-6.
However, unbeaten Wayne Bamforth reversed the tide as he raced into a two-love lead, 15-7 and 15-11.
He was pegged back 6-15 in the third, but bounced back to take the match 15-10.
Devonports’ Nathan Ttophi, who also remains unbeaten in the league this season, produced a fine opening two sets, 15-12 and 15-12 and then clinched the fourth set 15-11.
It was left to Tony Archer to complete the comeback in an encounter against the Peterborough skipper.
Archer started well, taking the opener 15-12, only for Peterborough to battle back and level at 15-13.
Archer took the honours, though, in another good display, 15-7 and 15-13.
A tight contest has put Devonports 15 points clear at the top with their challengers, St Neots and Peterborough, having one game in hand.
It means that Devonports need maximum points from their final match at the Haverhill Leisure Centre, against Cambridge, on April 7, to win the title.