Greg Rusedski took victory in his first Aberdeen Cup match against Andrew Murray, winning 7-5 7-6 (8-6).
Rusedski's greater experience told towards the end
The British number two and three are the top attractions in the two-day England v Scotland team challenge.
Play went with serve in their first set until Rusedski broke 18-year-old Murray at 6-5 to take the lead.
Murray battled hard in the second, coming back to 5-5 from 3-1 down, and forced a tie-break which he led 4-1 before Rusedski recovered to win 8-6.
The contest drew a large crowd to the Aberdeen Exhibition Centre, and the visitors held a slender 2-1½ advantage at the end of day one.
Wins in the women's singles for Scotland's Elena Baltacha over Katie O'Brien, and Joanna Henderson over Clare Sawyer in the girls' competition, meant Scotland had led going into the night's finale.
The opening match saw England's David Sherwood triumph over Jamie Murray following a tie-break.
Sherwood took the first set 6-4 after overpowering the Scot - Andy's older brother - who was 5-1 down at one stage.
But Murray produced a rousing display to take the second set 6-2 before eventually losing 7-4 in the match-deciding tie-break, after the players were locked at one set apiece.
Rusedski is due to face Andy Murray again on Sunday in both doubles and singles.