Heineken Open: Tommy Haas suffers early exit in Auckland
Tommy Haas saw his Heineken Open challenge brought to a shuddering halt by Jack Sock in Auckland.
Last Updated: 08/01/14 8:49am
Haas, the No 2 seed, was a finalist at the event back in 1999 - but he was a straight-set loser at the second-round stage this time around.
World No 12 Haas never really got going as he suffered a 6-4 6-4 defeat against the 21-year-old American.
It turned out to be a bad day for the seeds at the event, with Kevin Anderson and Benoit Paire also suffering second-round losses while Daniel Brands fell at the first hurdle.
Anderson, ranked four, crashed out 7-5 6-4 against Steve Johnson, who was playing his second match in the day having earlier toppled Marcos Baghdatis 7-5 6-7 (7-3) 6-4, while sixth seed Paire was edged out 6-3 6-5 by Roberto Bautista Agut.
Brands, the No 9 seed, failed to make it past the first round after he went down to 7-5 4-6 6-3 defeat against Bradley Klahn.
David Ferrer, John Isner and Philipp Kohlschreiber avoided upsets, though, as they booked their places in the last eight.
However top seed Ferrer and Isner, the No 3 seed, were forced to dig deep - with both taken to three sets.
Ferrer eventually overcame Donald Young 6-7 (7-5) 6-3 6-1, while Isner held his nerve to beat Lukas Lacko 7-6 (7-1) 3-6 6-2.
Fifth-ranked Kohlschreiber had no such problems as he registered a straight-forward 6-4 6-2 win over Horacio Zeballos.
Lu Yen-Hsun is also through to the last-eight after he ended Klahn's run 6-7 (7-3) 6-2 6-3, while Guillermo Garcia-Lopez toppled Santiago Giraldo 6-7 (9-7) 6-2 6-3.