From the news

Sock stunned in Auckland, ominous start from del Potro

  • ontennis
  • 10 January 2018
  • 09:01

Jack Sock started his season with a shock defeat to Peter Gojowczyk in the Auckland Open but Juan Martin del Potro hit the ground running to reach the quarter-finals.

Sock produced a stunning surge to qualify for the ATP World Tour Finals last year, but the American's first match of 2018 did not go to plan.

The top seed was beaten 6-3 6-3 by world number 65 Gojowczyk, the German winning 88 per cent of points on his first serve and breaking four times to move into the last eight.

Del Potro also finished last year strongly and the second seed saw off Denis Shapovalov 6-2 6-4 five days before the Australian Open gets under way, setting up a meeting with Karen Khachanov - who beat sixth seed Pablo Cuevas 6-2 7-6 (7-4).

The Argentine was crowned champion the last time he played in Auckland nine years ago and made only 11 unforced errors in a positive start to his campaign, advancing despite hitting just six winners to gain revenge for a Canadian Open loss to the teenager last year.

Sock's compatriot Sam Querrey also tumbled out, Jiri Vesely beating the third seed 6-4 6-7 (10-12) 7-6 (7-5) on Wednesday, while John Isner was another American seed to suffer defeat at the hands of Hyeon Chung. 

Four-time champion David Ferrer advanced with a 6-2 6-2 win over Joao Sousa, while Robin Haase also made it through.

Top seed Albert Ramos-Vinolas tumbled out of the Sydney International, losing 6-3 7-5 to Italian veteran Paolo Lorenzi.

Ramos-Vinolas lost to Guido Pella in his first match of the season at the Qatar Open and was treated for a leg injury in the second set before bowing out in Sydney after being given a first-round bye.

Defending champion Gilles Muller beat John Millman 7-6 (7-5) 6-4, while Feliciano Lopez toppled third seed Diego Schwartzman 6-3 7-6 (7-1).

Fabio Fognini, Adrian Mannarino, Benoit Paire, Daniil Medvedev and Alex de Minaur also moved into the quarter-finals.

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