New Zealand doubles specialist Michael Venus has seen off a French threat to book a semi-final berth at the ATP Finals in London.
Kiwi tennis player Michael Venus competes in the night session at the ASB Classic.
Venus and American Ryan Harrison overcome sixth-seeded Frenchmen Pierre-Hugues Herbert and Nicolas Mahut 6-7 6-4 10-5 in a match that went to a super tiebreak at the O2 Arena.
It means two wins from two at the lucrative season-ending tournament.
The French Open champions are guaranteed a place in the last four regardless the result of their final pool match against Julien Rojer (Netherlands) and Horia Tecau (Romania).
The win, which already ensures Venus will leave London with at least $100,000, came against opponents who also won their first match.
Venus and Harrison opened with a straight-sets win over the defending champions, Henri Kontinen (Finland) and John Peers (Australia).
Venus is the second Kiwi to contest the World Tour doubles finals. Brett Steven combined with American Tommy Ho in 1995.