Isner through, Ferrer crashes out in Auckland

American second seed John Isner battled through to the quarter-finals of the Auckland Open while third seed David Ferrer crashed out on Wednesday.

The big-serving Isner was unexpectedly pushed by world number 58 Malek Jaziri of Tunisia, needing three sets and two hours to win 6-3, 3-6, 7-6(6) to set up a meeting in the quarter-finals with seventh-seeded countryman Steve Johnson, who defeated Lu Yen-Hsun of Taiwan 6-4, 7-6(4).

In the opening set things went very much according to plan for Isner, who got the only service break in the eighth game, going on to win the set 6-3.

The 32-year-old Jaziri, to his credit, never stopped fighting and was rewarded when he managed to break serve in the sixth game to lead 4-2. He went on to even things up by winning the set 6-3.

In the decider, even though there were no breaks of serve, Jaziri did save three break points in the fifth game as the match went on to be decided by a tiebreaker, which Isner won 8-6 to clinch the set and match.         

In an upset, unseeded Robin Haase of the Netherlands beat third seed Ferrer of Spain 2-6, 6-4, 7-6(4) in a match lasting just over two hours while Cypriot eighth seed Marcos Baghdatis won a close three-setter against Germany's Dustin Brown 4-6, 7-6(4), 6-4.

Jeremy Chardy of France reached the next round when he was awarded a walkover against Spain's sixth seed Feliciano Lopez, Jiri Vesely of the Czech Republic got past Kiwi player Jose Statham 6-7(6), 7-5, 6-3 while Portugal's Joao Sousa cruised past Brydan Klein of Britain 6-3, 6-4.