Yesterday's match was a step too far for the duo, however, and after an epic semifinal win over top seeds Juan Sebastian Cabal and Robert Farah, they never quite got going.
Venus was in trouble at 15-40 in his opening service game but saved three break points to level at 1-1 and then he and Klaasen had three break points on Mahut in the next service game. On the second, a Venus backhand volley hit the top of the net and Mahut went on to hold. That was as close as it got for Venus and Klaasen in the first set.
The South African dished up two double faults in his first service game and Herbert fired a backhand winner past him to break serve. Games went with serve for the remainder of the set, which Mahut and Herbert won 6-3 in 33 minutes.
Venus saved two break points to hold serve in the opening game of the second set and Mahut saved a break point in the sixth game. But at 3-3, Klaasen found himself in a spot of trouble at 0-30. He got back to 30-30, but at 30-40, served a double fault and was broken for the second time in the match as the eighth seeds took control. Venus held serve for 4-5 but Mahut then served out the match.
Herbert and Mahut have gone one better after finishing runners-up last year. They have gone through the tournament unbeaten and will take home US$533,000 between them, while Venus and Klaasen share US$289,000. The 32-year-old Kiwi has earned just under US$650,000 for the season.