The Queenstown doubles specialist, who now represents Japan, claimed a second win at the ASB Classic yesterday, advancing to today’s semifinals.
He combined with British partner Luke Bambridge to beat Rohan Bopanna and Henri Kontinen 6-3, 6-4.
They will now play Sander Gille and Joran Vliegan.
McLachlan is aiming to defend the title he won last year with German JanLennard Struff.